From c3a5048e211764fa0a7ed773f0095f3f190c947b Mon Sep 17 00:00:00 2001
From: WPT Sync Bot <josh+wptsync@joshmatthews.net>
Date: Fri, 17 Jan 2020 08:23:40 +0000
Subject: [PATCH] Update web-platform-tests to revision
 a2dbc7c6cef42d2a272ebfb07bfb6f42da387cc1

---
 tests/wpt/metadata/MANIFEST.json              | 703 ++++++++++++++++--
 ...ackground-size-near-zero-gradient.html.ini |   2 +
 .../background-size-near-zero-png.html.ini    |   2 +
 .../background-size-near-zero-svg.html.ini    |   2 +
 ...on-from-ua-to-blocking-stylesheet.html.ini |   2 +-
 .../css/cssom-view/CaretPosition-001.html.ini |   4 -
 .../cssom-view/elementFromPosition.html.ini   |   3 -
 .../elementsFromPoint-invalid-cases.html.ini  |   4 +
 .../fetch/content-type/response.window.js.ini |  17 +-
 .../fetch/content-type/script.window.js.ini   |   3 +
 ...mbedded-credentials.tentative.sub.html.ini |   8 +-
 ...ml.ini => traverse_the_history_2.html.ini} |   2 +-
 .../html/dom/idlharness.https.html.ini        |   9 -
 .../skip-document-with-fragment.html.ini      |   4 -
 .../iframe_sandbox_popups_escaping-3.html.ini |   3 +-
 .../iframe-inheritance-data.html.ini          |   4 -
 .../webmessaging/without-ports/017.html.ini   |   5 -
 ...test_subscription_refSpaces.https.html.ini |   2 +
 .../Worker/Worker-constructor.html.ini        |   2 +
 .../policy-content-security-comma-in-policy   |   5 +
 ...y-content-security-double-content-security |   8 +
 .../policy-content-security-double-policies   |   6 +
 .../policy-content-security-noimg             |   5 +
 .../policy-content-security-noimg-report-only |   5 +
 .../policy-content-security-non-array         |   5 +
 .../policy-content-security-non-object        |   3 +
 .../policy-content-security-non-string        |   5 +
 .../policy-content-security-valid             |   5 +
 ...ntent-security-valid-with-multi-item-array |   5 +
 ...licy-content-security-valid-with-semicolon |   5 +
 .../.well-known/origin-policy/policy-csp-1    |   4 +-
 .../.well-known/origin-policy/policy-csp-2    |   6 +-
 .../.well-known/origin-policy/policy-noimg    |   3 -
 .../WebCryptoAPI/derive_bits_keys/hkdf.js     |   8 +-
 .../background-size-near-zero-color.html      |   7 +
 .../background-size-near-zero-gradient.html   |   8 +
 .../background-size-near-zero-png.html        |   8 +
 .../background-size-near-zero-svg.html        |   8 +
 .../background-size-near-zero-ref.html        |   2 +
 .../background-size/support/50x50-green.svg   |   3 +
 .../css/css-grid/grid-layout-properties.html  |   8 +-
 .../{text.https.html => text-01.https.html}   |   0
 .../layout-child/text-02.https.html           |  44 ++
 .../css-pseudo/marker-computed-content.html   |  64 ++
 .../css-pseudo/marker-content-019-ref.html    |  21 +
 .../css/css-pseudo/marker-content-019.html    |  40 +
 .../cssom/CSSStyleSheet-constructable.html    |  36 +-
 .../web-platform-tests/css/requirements.txt   |   2 +-
 .../multiple-redirects-TAO.sub.html           |  62 ++
 ...ect-image.html => redirects-tao-star.html} |   2 +-
 .../element-timing/resources/circle-tao.svg   |   6 +
 ...cle.svg.headers => circle-tao.svg.headers} |   0
 .../resources/element-timing-helpers.js       |   2 +
 .../resources/multiple-redirects.py           |  57 ++
 .../element-timing/same-origin-redirects.html |  37 +
 .../html/dom/idlharness.https.html            |   2 +-
 .../focus/focus-input-type-switch.html        |  26 +
 ...form-validation-validity-valueMissing.html |   4 +
 .../html/syntax/parsing/zero.html             |  93 +++
 .../web-platform-tests/interfaces/html.idl    |   2 +-
 .../interfaces/wai-aria.idl                   |   1 +
 ...rects-TAO.html => redirects-tao-star.html} |   8 +-
 .../same-origin-redirects.html                |  35 +
 .../MediaRecorder-disabled-tracks.https.html  |   2 +-
 .../MediaRecorder-mimetype.html               | 172 +++--
 .../MediaRecorder-no-sink.https.html          |  42 ++
 .../MediaRecorder-peerconnection.https.html   |  73 ++
 .../MediaRecorder-stop.html                   |  26 +-
 .../MediaRecorder-passthrough.https.html      |  61 ++
 .../utils/peerconnection.js                   | 156 ++++
 .../comma-in-policy.https.html                |  11 +
 .../comma-in-policy.https.html.headers        |   1 +
 .../double-content-security.https.html        |  13 +
 ...double-content-security.https.html.headers |   1 +
 .../double-policies.https.html                |  13 +
 .../double-policies.https.html.headers        |   1 +
 .../origin-policy/content-security/helper.js  |  73 ++
 .../content-security/non-array.https.html     |  11 +
 .../non-array.https.html.headers              |   1 +
 .../content-security/non-object.https.html    |  11 +
 .../non-object.https.html.headers             |   1 +
 .../content-security/non-string.https.html    |  11 +
 .../non-string.https.html.headers             |   1 +
 ...er-violation-report-report-only.https.html |  23 +
 ...tion-report-report-only.https.html.headers |   1 +
 .../trigger-violation-report.https.html       |  23 +
 ...rigger-violation-report.https.html.headers |   1 +
 .../valid-with-multi-item-array.https.html    |  13 +
 ...d-with-multi-item-array.https.html.headers |   1 +
 .../valid-with-semicolon.https.html           |  13 +
 .../valid-with-semicolon.https.html.headers   |   1 +
 .../content-security/valid.https.html         |  11 +
 .../content-security/valid.https.html.headers |   1 +
 ...-policy-single-report.https.tentative.html |  30 -
 ...single-report.https.tentative.html.headers |   1 -
 .../portals/portals-focus.sub.html            | 102 ++-
 .../portals/xfo/portals-xfo-deny.sub.html     |  28 +
 .../portals/xfo/resources/xfo-deny.asis       |   8 +
 .../inheritance/iframe-inheritance-data.html  |   2 +-
 .../chromium/webxr-test-math-helper.js        | 222 ++++++
 .../webxr-test-math-helper.js.headers         |   1 +
 .../resources/chromium/webxr-test.js          | 292 ++++++++
 .../resources/testharness.js                  |   2 +-
 .../tspan-opacity-mixed-direction-ref.svg     |   5 +
 .../tspan-opacity-mixed-direction.svg         |  10 +
 .../web-platform-tests/tools/wpt/browser.py   |   4 +-
 tests/wpt/web-platform-tests/tools/wpt/run.py |   3 +-
 .../tools/wptrunner/requirements.txt          |   2 +-
 .../webrtc/RTCDataChannel-close.html          |  36 +-
 .../webrtc/RTCRtpParameters-encodings.html    |  29 +-
 ..._hittest_subscription_refSpaces.https.html | 176 +++++
 .../webxr/resources/webxr_util.js             |   1 +
 112 files changed, 2867 insertions(+), 303 deletions(-)
 create mode 100644 tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-gradient.html.ini
 create mode 100644 tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-png.html.ini
 create mode 100644 tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-svg.html.ini
 delete mode 100644 tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
 create mode 100644 tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
 rename tests/wpt/metadata/html/browsers/history/the-history-interface/{traverse_the_history_4.html.ini => traverse_the_history_2.html.ini} (71%)
 delete mode 100644 tests/wpt/metadata/referrer-policy/generic/inheritance/iframe-inheritance-data.html.ini
 delete mode 100644 tests/wpt/metadata/webmessaging/without-ports/017.html.ini
 create mode 100644 tests/wpt/metadata/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html.ini
 create mode 100644 tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-comma-in-policy
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-content-security
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-policies
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg-report-only
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-array
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-object
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-string
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-multi-item-array
 create mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-semicolon
 delete mode 100644 tests/wpt/web-platform-tests/.well-known/origin-policy/policy-noimg
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-color.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-gradient.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-png.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-svg.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-backgrounds/background-size/support/50x50-green.svg
 rename tests/wpt/web-platform-tests/css/css-layout-api/layout-child/{text.https.html => text-01.https.html} (100%)
 create mode 100644 tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-02.https.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-pseudo/marker-computed-content.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019-ref.html
 create mode 100644 tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019.html
 create mode 100644 tests/wpt/web-platform-tests/element-timing/multiple-redirects-TAO.sub.html
 rename tests/wpt/web-platform-tests/element-timing/{multi-redirect-image.html => redirects-tao-star.html} (99%)
 create mode 100644 tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg
 rename tests/wpt/web-platform-tests/element-timing/resources/{circle.svg.headers => circle-tao.svg.headers} (100%)
 create mode 100644 tests/wpt/web-platform-tests/element-timing/resources/multiple-redirects.py
 create mode 100644 tests/wpt/web-platform-tests/element-timing/same-origin-redirects.html
 create mode 100644 tests/wpt/web-platform-tests/html/interaction/focus/focus-input-type-switch.html
 create mode 100644 tests/wpt/web-platform-tests/html/syntax/parsing/zero.html
 rename tests/wpt/web-platform-tests/largest-contentful-paint/{multi-redirects-TAO.html => redirects-tao-star.html} (87%)
 create mode 100644 tests/wpt/web-platform-tests/largest-contentful-paint/same-origin-redirects.html
 create mode 100644 tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-no-sink.https.html
 create mode 100644 tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html
 create mode 100644 tests/wpt/web-platform-tests/mediacapture-record/passthrough/MediaRecorder-passthrough.https.html
 create mode 100644 tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/helper.js
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html.headers
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html
 create mode 100644 tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html.headers
 delete mode 100644 tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html
 delete mode 100644 tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html.headers
 create mode 100644 tests/wpt/web-platform-tests/portals/xfo/portals-xfo-deny.sub.html
 create mode 100644 tests/wpt/web-platform-tests/portals/xfo/resources/xfo-deny.asis
 create mode 100644 tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js
 create mode 100644 tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js.headers
 create mode 100644 tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction-ref.svg
 create mode 100644 tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction.svg
 create mode 100644 tests/wpt/web-platform-tests/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html

diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 4f66f5d2e80..9f4cdf462c7 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -107789,6 +107789,54 @@
      {}
     ]
    ],
+   "css/css-backgrounds/background-size/background-size-near-zero-color.html": [
+    [
+     "css/css-backgrounds/background-size/background-size-near-zero-color.html",
+     [
+      [
+       "/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-backgrounds/background-size/background-size-near-zero-gradient.html": [
+    [
+     "css/css-backgrounds/background-size/background-size-near-zero-gradient.html",
+     [
+      [
+       "/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-backgrounds/background-size/background-size-near-zero-png.html": [
+    [
+     "css/css-backgrounds/background-size/background-size-near-zero-png.html",
+     [
+      [
+       "/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-backgrounds/background-size/background-size-near-zero-svg.html": [
+    [
+     "css/css-backgrounds/background-size/background-size-near-zero-svg.html",
+     [
+      [
+       "/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-backgrounds/background-size/vector/background-size-vector-001.html": [
     [
      "css/css-backgrounds/background-size/vector/background-size-vector-001.html",
@@ -131883,9 +131931,21 @@
      {}
     ]
    ],
-   "css/css-layout-api/layout-child/text.https.html": [
+   "css/css-layout-api/layout-child/text-01.https.html": [
     [
-     "css/css-layout-api/layout-child/text.https.html",
+     "css/css-layout-api/layout-child/text-01.https.html",
+     [
+      [
+       "/css/css-layout-api/green-square-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "css/css-layout-api/layout-child/text-02.https.html": [
+    [
+     "css/css-layout-api/layout-child/text-02.https.html",
      [
       [
        "/css/css-layout-api/green-square-ref.html",
@@ -141171,6 +141231,18 @@
      {}
     ]
    ],
+   "css/css-pseudo/marker-content-019.html": [
+    [
+     "css/css-pseudo/marker-content-019.html",
+     [
+      [
+       "/css/css-pseudo/marker-content-019-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-pseudo/marker-display-dynamic-001.html": [
     [
      "css/css-pseudo/marker-display-dynamic-001.html",
@@ -212569,6 +212641,18 @@
      {}
     ]
    ],
+   "svg/text/reftests/tspan-opacity-mixed-direction.svg": [
+    [
+     "svg/text/reftests/tspan-opacity-mixed-direction.svg",
+     [
+      [
+       "/svg/text/reftests/tspan-opacity-mixed-direction-ref.svg",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "web-animations/timing-model/animations/reverse-running-animation.html": [
     [
      "web-animations/timing-model/animations/reverse-running-animation.html",
@@ -215645,6 +215729,39 @@
    ".well-known/idp-proxy/mock-idp.js": [
     []
    ],
+   ".well-known/origin-policy/policy-content-security-comma-in-policy": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-double-content-security": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-double-policies": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-noimg": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-noimg-report-only": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-non-array": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-non-object": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-non-string": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-valid": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-valid-with-multi-item-array": [
+    []
+   ],
+   ".well-known/origin-policy/policy-content-security-valid-with-semicolon": [
+    []
+   ],
    ".well-known/origin-policy/policy-csp-1": [
     []
    ],
@@ -215669,9 +215786,6 @@
    ".well-known/origin-policy/policy-features-valid": [
     []
    ],
-   ".well-known/origin-policy/policy-noimg": [
-    []
-   ],
    "2dcontext/2x2.png": [
     []
    ],
@@ -247682,6 +247796,9 @@
    "css/css-backgrounds/background-size/reference/background-size-cover.xht": [
     []
    ],
+   "css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html": [
+    []
+   ],
    "css/css-backgrounds/background-size/reference/support/rectangle-96x60.png": [
     []
    ],
@@ -247691,6 +247808,9 @@
    "css/css-backgrounds/background-size/support/50x50-green.png": [
     []
    ],
+   "css/css-backgrounds/background-size/support/50x50-green.svg": [
+    []
+   ],
    "css/css-backgrounds/background-size/support/rectangle-2560x208.svg": [
     []
    ],
@@ -257675,6 +257795,9 @@
    "css/css-pseudo/marker-content-018-ref.html": [
     []
    ],
+   "css/css-pseudo/marker-content-019-ref.html": [
+    []
+   ],
    "css/css-pseudo/marker-font-properties-ref.html": [
     []
    ],
@@ -270044,10 +270167,13 @@
    "element-timing/resources/TAOImage.py": [
     []
    ],
-   "element-timing/resources/circle.svg": [
+   "element-timing/resources/circle-tao.svg": [
     []
    ],
-   "element-timing/resources/circle.svg.headers": [
+   "element-timing/resources/circle-tao.svg.headers": [
+    []
+   ],
+   "element-timing/resources/circle.svg": [
     []
    ],
    "element-timing/resources/element-timing-helpers.js": [
@@ -270065,6 +270191,9 @@
    "element-timing/resources/iframe-with-square.html": [
     []
    ],
+   "element-timing/resources/multiple-redirects.py": [
+    []
+   ],
    "element-timing/resources/progressive-image.py": [
     []
    ],
@@ -281249,6 +281378,9 @@
    "mediacapture-record/support/MediaRecorder-iframe.html": [
     []
    ],
+   "mediacapture-record/utils/peerconnection.js": [
+    []
+   ],
    "mediacapture-streams/META.yml": [
     []
    ],
@@ -282146,6 +282278,42 @@
    "orientation-sensor/orientation-sensor-tests.js": [
     []
    ],
+   "origin-policy/content-security/comma-in-policy.https.html.headers": [
+    []
+   ],
+   "origin-policy/content-security/double-content-security.https.html.headers": [
+    []
+   ],
+   "origin-policy/content-security/double-policies.https.html.headers": [
+    []
+   ],
+   "origin-policy/content-security/helper.js": [
+    []
+   ],
+   "origin-policy/content-security/non-array.https.html.headers": [
+    []
+   ],
+   "origin-policy/content-security/non-object.https.html.headers": [
+    []
+   ],
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@@ -439494,6 +439799,12 @@
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+  "element-timing/same-origin-redirects.html": [
+   "3527d805f3e01d94a5f1b19085fd63d2f689a8b8",
+   "testharness"
+  ],
   "element-timing/scroll-to-text.html": [
    "ed332740323b076f160121dbd14390f246413c36",
    "testharness"
@@ -656001,7 +656408,7 @@
    "testharness"
   ],
   "html/dom/idlharness.https.html": [
-   "33ad5c6f6169a7e376aaadeba1b8df4dd6815f7c",
+   "42d521272dd6bbbce20288e65ec507eb3d44a274",
    "testharness"
   ],
   "html/dom/idlharness.worker.js": [
@@ -660552,6 +660959,10 @@
    "d3007112ffb9419e7774d869c53e353ebe2cec8f",
    "testharness"
   ],
+  "html/interaction/focus/focus-input-type-switch.html": [
+   "eeebe488bf6901ff25663389582bc96ad4e09660",
+   "testharness"
+  ],
   "html/interaction/focus/focus-management/focus-event-targets-simple.html": [
    "ab7bcfe6d0e636552746def160715bc47e63fb85",
    "testharness"
@@ -665777,7 +666188,7 @@
    "testharness"
   ],
   "html/semantics/forms/constraints/form-validation-validity-valueMissing.html": [
-   "3229527fabc00880bd2f95d7aa4f494ce9884fa3",
+   "223d54cef8dab9f30c8eb5d6ca8c3a406f1e281d",
    "testharness"
   ],
   "html/semantics/forms/constraints/form-validation-willValidate.html": [
@@ -670532,6 +670943,10 @@
    "e4048615072a828299f9222f94b9a01dcb2df4e8",
    "testharness"
   ],
+  "html/syntax/parsing/zero.html": [
+   "9ff793ae7c6fb6504a64e7f4285b30b68972d0fe",
+   "testharness"
+  ],
   "html/syntax/serializing-html-fragments/initial-linefeed-pre.html": [
    "d4e30bb60d3e0a9ac7c0f954c3e9d7441b9457b9",
    "testharness"
@@ -673729,7 +674144,7 @@
    "support"
   ],
   "interfaces/html.idl": [
-   "2c0c489315c96b6980181236b8602df60929c3f9",
+   "374ce8342b02f99cfca5eda1d23dd3c6bd9a4451",
    "support"
   ],
   "interfaces/image-capture.idl": [
@@ -673965,7 +674380,7 @@
    "support"
   ],
   "interfaces/wai-aria.idl": [
-   "c4fbf11409cf142d8295038d256f5a686d860a55",
+   "f9406b3989b61656b9c2681f5f19d971fe98ed8a",
    "support"
   ],
   "interfaces/wake-lock.idl": [
@@ -674624,10 +675039,6 @@
    "0e40127b57683fa76392827003b15c2bb9c8d558",
    "testharness"
   ],
-  "largest-contentful-paint/multi-redirects-TAO.html": [
-   "4e462c729aace01d40b9255465af7fc79f8fdb3c",
-   "testharness"
-  ],
   "largest-contentful-paint/observe-after-untrusted-scroll.html": [
    "1b2cd1d25b5bb9da740e5127526fed41dcebfae7",
    "testharness"
@@ -674640,6 +675051,10 @@
    "a2a376fde335cb2b9e05c8923998bfc15c2695f1",
    "testharness"
   ],
+  "largest-contentful-paint/redirects-tao-star.html": [
+   "0667266e6d292337a676bb4f26acbb80701bc3af",
+   "testharness"
+  ],
   "largest-contentful-paint/repeated-image.html": [
    "82d662d330ab74ce88773257dadfb75af87451d1",
    "testharness"
@@ -674652,6 +675067,10 @@
    "0529e227b8094656361a7ab9d5ae81a92f0e8934",
    "support"
   ],
+  "largest-contentful-paint/same-origin-redirects.html": [
+   "e17fdbb69e6fb8bafabd0dae7e2d23b601fd57d7",
+   "testharness"
+  ],
   "largest-contentful-paint/supported-lcp-type.html": [
    "25d4eaa0367f45440d286c6c1c14de4458465d7b",
    "testharness"
@@ -677189,7 +677608,7 @@
    "testharness"
   ],
   "mediacapture-record/MediaRecorder-disabled-tracks.https.html": [
-   "52e0010cfef0f78e5309f53b77a1d205834c2302",
+   "b98aed23668ab5d8ee7102044aacc34cc3ce004f",
    "testharness"
   ],
   "mediacapture-record/MediaRecorder-error.html": [
@@ -677201,25 +677620,41 @@
    "testharness"
   ],
   "mediacapture-record/MediaRecorder-mimetype.html": [
-   "e90bbcced989d5c5b7fa8a978821316b0150c731",
+   "06841aea9e66d26ef77be3b95018a97cfbf70bd9",
+   "testharness"
+  ],
+  "mediacapture-record/MediaRecorder-no-sink.https.html": [
+   "7f5ff934fad7ccb47b742bd4cb8546e3a745b483",
    "testharness"
   ],
   "mediacapture-record/MediaRecorder-pause-resume.html": [
    "33dfd8560c04d9e9de335b13cfcb33428a6b7e24",
    "testharness"
   ],
+  "mediacapture-record/MediaRecorder-peerconnection.https.html": [
+   "88e9da78a7a55af1e99a2a483e962ac19fe0ff76",
+   "testharness"
+  ],
   "mediacapture-record/MediaRecorder-stop.html": [
-   "1cc18f4c854d368bf3508ade3bcfd3514ca409ec",
+   "bda5d871d04cd3fc52cd4a30efd0392f3708c9bb",
    "testharness"
   ],
   "mediacapture-record/idlharness.window.js": [
    "2e304b0a0e6ece247614c5c692ef0e368f5ad216",
    "testharness"
   ],
+  "mediacapture-record/passthrough/MediaRecorder-passthrough.https.html": [
+   "655b7a1192378d8ee7766c801c1818c3f9d595a9",
+   "testharness"
+  ],
   "mediacapture-record/support/MediaRecorder-iframe.html": [
    "6e70acf4862cc2c0f10d0b2642994bf04f794e44",
    "support"
   ],
+  "mediacapture-record/utils/peerconnection.js": [
+   "817095e981f7724ba4d8a9f1cec26d2b4b7e3b4d",
+   "support"
+  ],
   "mediacapture-streams/GUM-api.https.html": [
    "148317017692e935a936eb007ed90fd9ceb29825",
    "testharness"
@@ -687380,6 +687815,98 @@
    "fb6d83faa8bec709724777aa3fe5caaada5daf11",
    "support"
   ],
+  "origin-policy/content-security/comma-in-policy.https.html": [
+   "88d72446392e6751253d658edee7b79475af1fc3",
+   "testharness"
+  ],
+  "origin-policy/content-security/comma-in-policy.https.html.headers": [
+   "32e453ab20de0c3241e602cdf0af50769f741744",
+   "support"
+  ],
+  "origin-policy/content-security/double-content-security.https.html": [
+   "99046803c9fe305489a0aba915fc0d2f2aa40eb2",
+   "testharness"
+  ],
+  "origin-policy/content-security/double-content-security.https.html.headers": [
+   "a380b053c270c6159ff62497179c5a346b703047",
+   "support"
+  ],
+  "origin-policy/content-security/double-policies.https.html": [
+   "925b9d5a31e10ff865cf6125f677933211627251",
+   "testharness"
+  ],
+  "origin-policy/content-security/double-policies.https.html.headers": [
+   "23f1d1434057d27edf57fe4108cc7399b01915ff",
+   "support"
+  ],
+  "origin-policy/content-security/helper.js": [
+   "4875977afa4437abf6523426eedf99ee19a62e35",
+   "support"
+  ],
+  "origin-policy/content-security/non-array.https.html": [
+   "78a67e16eb9d3058371e4d0dc0b389b007f4ef10",
+   "testharness"
+  ],
+  "origin-policy/content-security/non-array.https.html.headers": [
+   "31e6f375ef967e2173a0ab49063d22001612449a",
+   "support"
+  ],
+  "origin-policy/content-security/non-object.https.html": [
+   "359c6c7692294ebb1bfe0104b3a79c2e924af075",
+   "testharness"
+  ],
+  "origin-policy/content-security/non-object.https.html.headers": [
+   "812ea9445eca18decb01d648fa916203ffea7f0d",
+   "support"
+  ],
+  "origin-policy/content-security/non-string.https.html": [
+   "8af3c1c4dff13699d37175590231d40d7bf61e4e",
+   "testharness"
+  ],
+  "origin-policy/content-security/non-string.https.html.headers": [
+   "0b9ce2ee3f84c520fcba14d1267d93f7be48ce41",
+   "support"
+  ],
+  "origin-policy/content-security/trigger-violation-report-report-only.https.html": [
+   "3e5038b501dec9e5fd028018fa832a5144c81b34",
+   "testharness"
+  ],
+  "origin-policy/content-security/trigger-violation-report-report-only.https.html.headers": [
+   "cb27e1500e0b4e484bc83d02ec3f6cc85aab43e1",
+   "support"
+  ],
+  "origin-policy/content-security/trigger-violation-report.https.html": [
+   "22beca5a3dbbc9251bbde3580a0a9997488c463b",
+   "testharness"
+  ],
+  "origin-policy/content-security/trigger-violation-report.https.html.headers": [
+   "08bcb9fa94171eeaf7df9b8c33487968f105e323",
+   "support"
+  ],
+  "origin-policy/content-security/valid-with-multi-item-array.https.html": [
+   "bc9ebd0cccfcbd7d2fa28dfd7bea914de449c725",
+   "testharness"
+  ],
+  "origin-policy/content-security/valid-with-multi-item-array.https.html.headers": [
+   "eeddaba7a59b580a7d94599c805fab7ef1297b29",
+   "support"
+  ],
+  "origin-policy/content-security/valid-with-semicolon.https.html": [
+   "82158f1cf7044f8dcf3eeb652e521494a801c667",
+   "testharness"
+  ],
+  "origin-policy/content-security/valid-with-semicolon.https.html.headers": [
+   "eeddaba7a59b580a7d94599c805fab7ef1297b29",
+   "support"
+  ],
+  "origin-policy/content-security/valid.https.html": [
+   "36e5ddbf958b317ef703b1309d037b21a2186596",
+   "testharness"
+  ],
+  "origin-policy/content-security/valid.https.html.headers": [
+   "78aeeacd934c90fabddd5ddd7b3a1f6a4e5dd9a3",
+   "support"
+  ],
   "origin-policy/features/comma-in-policy.https.html": [
    "1b991f0d8b68af01681d9b77a9b21506ffe3fd58",
    "testharness"
@@ -687440,14 +687967,6 @@
    "92a90c347d3a7d009bb3a71c586ef598f3770d47",
    "support"
   ],
-  "origin-policy/origin-policy-single-report.https.tentative.html": [
-   "24ee89990548ade02ff38ab4c87d873162a88613",
-   "testharness"
-  ],
-  "origin-policy/origin-policy-single-report.https.tentative.html.headers": [
-   "9456832d23cbe38cc7080444d79fd89cdded66c7",
-   "support"
-  ],
   "origin-policy/origin-policy.https.tentative.html": [
    "34a71fe40a192418a3f9a5792d7ee5fdecf970dd",
    "testharness"
@@ -688933,7 +689452,7 @@
    "testharness"
   ],
   "portals/portals-focus.sub.html": [
-   "a05786186e5d332c019765106e051ec457eb4495",
+   "1427dae2e4d13cd849fdc4f92dbcd9d4b2cad280",
    "testharness"
   ],
   "portals/portals-host-exposure.sub.html": [
@@ -689140,6 +689659,14 @@
    "29380099af1a3b9bf0990990ecefd8fa632d30c4",
    "support"
   ],
+  "portals/xfo/portals-xfo-deny.sub.html": [
+   "13c3f7f4d1fcdde9d2a744955bce6308805f1618",
+   "testharness"
+  ],
+  "portals/xfo/resources/xfo-deny.asis": [
+   "429a40e559abeb5cf6512fe4133b7d20b806e832",
+   "support"
+  ],
   "preload/META.yml": [
    "fd10e7d15abd6ed0f4e76581b225ca1e9a248c79",
    "support"
@@ -701921,7 +702448,7 @@
    "testharness"
   ],
   "referrer-policy/generic/inheritance/iframe-inheritance-data.html": [
-   "0a45bb36c11f26c515ab91a58a884e78ed2b34b7",
+   "368e77e1217d449f558f6e45174227fd64e3b27d",
    "testharness"
   ],
   "referrer-policy/generic/inheritance/iframe-inheritance-srcdoc-child.html": [
@@ -702932,8 +703459,16 @@
    "6805c323df5a975231648b830e33ce183c3cbbd3",
    "support"
   ],
+  "resources/chromium/webxr-test-math-helper.js": [
+   "0147f50f3712af39734ddd7db3bee073a1d8c923",
+   "support"
+  ],
+  "resources/chromium/webxr-test-math-helper.js.headers": [
+   "6805c323df5a975231648b830e33ce183c3cbbd3",
+   "support"
+  ],
   "resources/chromium/webxr-test.js": [
-   "ca627543aa48f6cd295b69fd34047d382763cfa3",
+   "16191695e894f91e9a09aea1cfb7d9deb0307de9",
    "support"
   ],
   "resources/chromium/webxr-test.js.headers": [
@@ -703333,7 +703868,7 @@
    "support"
   ],
   "resources/testharness.js": [
-   "2c3664dfa6ab5518019dc6f2c27e275bb6a62a16",
+   "9ff22b43072c3d3d8affb3fd0aa0b4dfdb3f933c",
    "support"
   ],
   "resources/testharness.js.headers": [
@@ -713628,6 +714163,14 @@
    "a4b6bf52bd2c6bd7492d18f32ded4b7590b302f9",
    "reftest"
   ],
+  "svg/text/reftests/tspan-opacity-mixed-direction-ref.svg": [
+   "f07911627fed87722b41ddb7a006eb1b7a65a63a",
+   "support"
+  ],
+  "svg/text/reftests/tspan-opacity-mixed-direction.svg": [
+   "fa153250e79ab6a60bf167c659b4e2d777609a30",
+   "reftest"
+  ],
   "svg/text/visualtests/text-inline-size-001-visual.svg": [
    "086bab33b0030bb1d40dc17f960b7e3cbb098ae6",
    "visual"
@@ -718829,7 +719372,7 @@
    "support"
   ],
   "tools/wpt/browser.py": [
-   "6dd2f5c4c9001f1edfa0a723759444c53106d673",
+   "f0c2eeb94b8c52c5c6d10491fd952437163d0c0a",
    "support"
   ],
   "tools/wpt/commands.json": [
@@ -718865,7 +719408,7 @@
    "support"
   ],
   "tools/wpt/run.py": [
-   "0c732e7ae8aee7d441015642ba8f2fcbd7e66e0e",
+   "f6906fd0ac7d221840cda09372872aec84698e3e",
    "support"
   ],
   "tools/wpt/testfiles.py": [
@@ -718953,7 +719496,7 @@
    "support"
   ],
   "tools/wptrunner/requirements.txt": [
-   "74a358ed10b54d1482b4732fdc9c97e01c75c22d",
+   "328b43a0737b98503ae0b85dabb35b3a38d958e0",
    "support"
   ],
   "tools/wptrunner/requirements_android_webview.txt": [
@@ -729237,7 +729780,7 @@
    "testharness"
   ],
   "webrtc/RTCDataChannel-close.html": [
-   "9f43dc93c5ba7917c327d642fa6883ff19d74cac",
+   "a417d66d9aaeda3cf551a981aac05a0732d183e2",
    "testharness"
   ],
   "webrtc/RTCDataChannel-id.html": [
@@ -729493,7 +730036,7 @@
    "testharness"
   ],
   "webrtc/RTCRtpParameters-encodings.html": [
-   "0d3d08a1a2b1d8148915f538b4d57d3a3ea6eea2",
+   "c9e14cb374b232b8f9df0472f082b16cc02f9f28",
    "testharness"
   ],
   "webrtc/RTCRtpParameters-headerExtensions.html": [
@@ -734424,6 +734967,10 @@
    "201a9b72208fae4f64ded8082b7ba11000517313",
    "testharness"
   ],
+  "webxr/hit-test/ar_hittest_subscription_refSpaces.https.html": [
+   "3cbbd6ca3db5055f8f6f52c2bc73ca2540f505f8",
+   "testharness"
+  ],
   "webxr/hit-test/xrRay_constructor.https.html": [
    "08f20142e38e9366bd016fb92666b5136128fef6",
    "testharness"
@@ -734469,7 +735016,7 @@
    "support"
   ],
   "webxr/resources/webxr_util.js": [
-   "85821d4d3d5d7fd953cace5e7ea7bacc9d3b7dab",
+   "5f66dc9573d37630d588265f20e5b57a8175766f",
    "support"
   ],
   "webxr/webGLCanvasContext_create_xrcompatible.https.html": [
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-gradient.html.ini b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-gradient.html.ini
new file mode 100644
index 00000000000..7326b5c886f
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-gradient.html.ini
@@ -0,0 +1,2 @@
+[background-size-near-zero-gradient.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-png.html.ini b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-png.html.ini
new file mode 100644
index 00000000000..89fc0fa4254
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-png.html.ini
@@ -0,0 +1,2 @@
+[background-size-near-zero-png.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-svg.html.ini b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-svg.html.ini
new file mode 100644
index 00000000000..8fa6ff0186b
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/background-size/background-size-near-zero-svg.html.ini
@@ -0,0 +1,2 @@
+[background-size-near-zero-svg.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini b/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
index e35a452a186..70a00a101f6 100644
--- a/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
+++ b/tests/wpt/metadata/css/css-transitions/no-transition-from-ua-to-blocking-stylesheet.html.ini
@@ -1,2 +1,2 @@
 [no-transition-from-ua-to-blocking-stylesheet.html]
-  expected: TIMEOUT
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini b/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
deleted file mode 100644
index 4c79907309b..00000000000
--- a/tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[CaretPosition-001.html]
-  [Element at (400, 100)]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
index 60d2eb026f3..85e94926cb3 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
@@ -18,9 +18,6 @@
   [test some point of the element: bottom right corner]
     expected: FAIL
 
-  [test some point of the element: top left corner]
-    expected: FAIL
-
   [test the top of layer]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
new file mode 100644
index 00000000000..e181af5397f
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
@@ -0,0 +1,4 @@
+[elementsFromPoint-invalid-cases.html]
+  [The root element is the last element returned for otherwise empty queries within the viewport]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/content-type/response.window.js.ini b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
index e98eb06f3ea..15db43cb477 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -318,15 +318,18 @@
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/plain */*]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index e67f0406fc3..d2df9b78483 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,3 +53,6 @@
   [combined text/javascript ]
     expected: FAIL
 
+  [separate text/javascript x/x]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
index 54eb82367bf..6bd06899fdd 100644
--- a/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
+++ b/tests/wpt/metadata/fetch/security/embedded-credentials.tentative.sub.html.ini
@@ -1,6 +1,6 @@
 [embedded-credentials.tentative.sub.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Embedded credentials are treated as network errors.]
     expected: FAIL
 
@@ -13,3 +13,9 @@
   [Embedded credentials matching the top-level are treated as network errors for cross-origin URLs.]
     expected: TIMEOUT
 
+  [Embedded credentials matching the top-level are not treated as network errors for same-origin URLs.]
+    expected: TIMEOUT
+
+  [Embedded credentials matching the top-level are not treated as network errors for relative URLs.]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
similarity index 71%
rename from tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
rename to tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
index 385376c7321..75d75b4cda2 100644
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_2.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_4.html]
+[traverse_the_history_2.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/dom/idlharness.https.html.ini b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
index 554531a68b5..9e4822fb22f 100644
--- a/tests/wpt/metadata/html/dom/idlharness.https.html.ini
+++ b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
@@ -2436,9 +2436,6 @@
   [HTMLElement interface: document.createElement("noscript") must inherit property "translate" with the proper type]
     expected: FAIL
 
-  [HTMLMediaElement interface: document.createElement("video") must inherit property "srcObject" with the proper type]
-    expected: FAIL
-
   [HTMLFrameElement interface: document.createElement("frame") must inherit property "contentWindow" with the proper type]
     expected: FAIL
 
@@ -2889,9 +2886,6 @@
   [HTMLInputElement interface: createInput("color") must inherit property "useMap" with the proper type]
     expected: FAIL
 
-  [HTMLMediaElement interface: document.createElement("audio") must inherit property "srcObject" with the proper type]
-    expected: FAIL
-
   [HTMLInputElement interface: createInput("month") must inherit property "validationMessage" with the proper type]
     expected: FAIL
 
@@ -3861,9 +3855,6 @@
   [HTMLInputElement interface: createInput("color") must inherit property "align" with the proper type]
     expected: FAIL
 
-  [HTMLMediaElement interface: new Audio() must inherit property "srcObject" with the proper type]
-    expected: FAIL
-
   [HTMLMenuElement interface: existence and properties of interface prototype object's "constructor" property]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
index 6852d7663de..c12c0f8ae48 100644
--- a/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
+++ b/tests/wpt/metadata/html/interaction/focus/the-autofocus-attribute/skip-document-with-fragment.html.ini
@@ -1,8 +1,4 @@
 [skip-document-with-fragment.html]
-  expected: TIMEOUT
   [Autofocus elements in iframed documents with URL fragments should be skipped.]
     expected: FAIL
 
-  [Autofocus elements in top-level browsing context's documents with URI fragments should be skipped.]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index f6a7aca3306..5f60c78e73c 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,5 +1,6 @@
 [iframe_sandbox_popups_escaping-3.html]
   type: testharness
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/referrer-policy/generic/inheritance/iframe-inheritance-data.html.ini b/tests/wpt/metadata/referrer-policy/generic/inheritance/iframe-inheritance-data.html.ini
deleted file mode 100644
index a89ac7f260c..00000000000
--- a/tests/wpt/metadata/referrer-policy/generic/inheritance/iframe-inheritance-data.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[iframe-inheritance-data.html]
-  [iframes with data url uses no referrer]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
deleted file mode 100644
index 064cf47545b..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html.ini b/tests/wpt/metadata/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html.ini
new file mode 100644
index 00000000000..acc47d4ee07
--- /dev/null
+++ b/tests/wpt/metadata/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html.ini
@@ -0,0 +1,2 @@
+[ar_hittest_subscription_refSpaces.https.html]
+  expected: ERROR
diff --git a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
new file mode 100644
index 00000000000..80f9a4f15b8
--- /dev/null
+++ b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
@@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-comma-in-policy b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-comma-in-policy
new file mode 100644
index 00000000000..42990f93e6d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-comma-in-policy
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline', img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-content-security b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-content-security
new file mode 100644
index 00000000000..be9b3750647
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-content-security
@@ -0,0 +1,8 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'"]
+  },
+  "content_security": {
+    "policies": ["img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-policies b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-policies
new file mode 100644
index 00000000000..2e625c5c463
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-double-policies
@@ -0,0 +1,6 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'"],
+    "policies": ["img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg
new file mode 100644
index 00000000000..cd57b7b21e9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": ["img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg-report-only b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg-report-only
new file mode 100644
index 00000000000..13c662ef2d6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-noimg-report-only
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies_report_only": ["img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-array b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-array
new file mode 100644
index 00000000000..b96546c5f88
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-array
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": "script-src 'self' 'unsafe-inline'"
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-object b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-object
new file mode 100644
index 00000000000..7f6e1383640
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-object
@@ -0,0 +1,3 @@
+{
+  "content_security": ["script-src 'self' 'unsafe-inline'"]
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-string b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-string
new file mode 100644
index 00000000000..8649b17c4d8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-non-string
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": [["script-src 'self' 'unsafe-inline'"]]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid
new file mode 100644
index 00000000000..d4babb7949e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-multi-item-array b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-multi-item-array
new file mode 100644
index 00000000000..45ec32200d5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-multi-item-array
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'", "img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-semicolon b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-semicolon
new file mode 100644
index 00000000000..e777d5c96d5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-content-security-valid-with-semicolon
@@ -0,0 +1,5 @@
+{
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'; img-src 'none'"]
+  }
+}
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-1 b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-1
index adbfc362580..d4babb7949e 100644
--- a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-1
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-1
@@ -1,3 +1,5 @@
 {
-  "content-security-policy": [{ "policy": "script-src 'self' 'unsafe-inline'" }]
+  "content_security": {
+    "policies": ["script-src 'self' 'unsafe-inline'"]
+  }
 }
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-2 b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-2
index e896da36303..34a6c5c873b 100644
--- a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-2
+++ b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-csp-2
@@ -1,5 +1,5 @@
 {
-  "content-security-policy": [{
-    "policy": "script-src 'self' 'nonce-test'"
-  }]
+  "content_security": {
+    "policies": ["script-src 'self' 'nonce-test'"]
+  }
 }
diff --git a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-noimg b/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-noimg
deleted file mode 100644
index fce2d40c6e0..00000000000
--- a/tests/wpt/web-platform-tests/.well-known/origin-policy/policy-noimg
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "content-security-policy": [{ "policy": "img-src 'none'" }]
-}
diff --git a/tests/wpt/web-platform-tests/WebCryptoAPI/derive_bits_keys/hkdf.js b/tests/wpt/web-platform-tests/WebCryptoAPI/derive_bits_keys/hkdf.js
index c18a433d7f9..2bb58533473 100644
--- a/tests/wpt/web-platform-tests/WebCryptoAPI/derive_bits_keys/hkdf.js
+++ b/tests/wpt/web-platform-tests/WebCryptoAPI/derive_bits_keys/hkdf.js
@@ -86,7 +86,7 @@ function define_tests() {
                             // - illegal name for hash algorithm (NotSupportedError)
                             var badHash = hashName.substring(0, 3) + hashName.substring(4);
                             subsetTest(promise_test, function(test) {
-                                var badAlgorithm = {name: "HKDF", salt: salts[saltSize], hash: badHash};
+                                var badAlgorithm = {name: "HKDF", salt: salts[saltSize], hash: badHash, info: algorithm.info};
                                 return subtle.deriveKey(badAlgorithm, baseKeys[derivedKeySize], derivedKeyType.algorithm, true, derivedKeyType.usages)
                                 .then(function(key) {
                                     assert_unreached("bad hash name should have thrown an NotSupportedError");
@@ -143,9 +143,9 @@ function define_tests() {
                         subsetTest(promise_test, function(test) {
                             return subtle.deriveBits(algorithm, baseKeys[derivedKeySize], null)
                             .then(function(derivation) {
-                                assert_unreached("null length should have thrown an TypeError");
+                                assert_unreached("null length should have thrown an OperationError");
                             }, function(err) {
-                                assert_equals(err.name, "TypeError", "deriveBits with null length correctly threw OperationError: " + err.message);
+                                assert_equals(err.name, "OperationError", "deriveBits with null length correctly threw OperationError: " + err.message);
                             });
                         }, testName + " with null length");
 
@@ -162,7 +162,7 @@ function define_tests() {
                         // - illegal name for hash algorithm (NotSupportedError)
                         var badHash = hashName.substring(0, 3) + hashName.substring(4);
                         subsetTest(promise_test, function(test) {
-                            var badAlgorithm = {name: "HKDF", salt: salts[saltSize], hash: badHash};
+                            var badAlgorithm = {name: "HKDF", salt: salts[saltSize], hash: badHash, info: algorithm.info};
                             return subtle.deriveBits(badAlgorithm, baseKeys[derivedKeySize], 256)
                             .then(function(derivation) {
                                 assert_unreached("bad hash name should have thrown an NotSupportedError");
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-color.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-color.html
new file mode 100644
index 00000000000..b85895b85b2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-color.html
@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<title>Color background with near-zero background-size</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-size">
+<link rel="match" href="reference/background-size-near-zero-ref.html">
+<div style="background-color: green;
+            width: 100px; height: 100px; background-size: 0.2px 0.2px">
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-gradient.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-gradient.html
new file mode 100644
index 00000000000..a232fc8c034
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-gradient.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<title>Gradient background with near-zero background-size</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-size">
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-image">
+<link rel="match" href="reference/background-size-near-zero-ref.html">
+<div style="background-image: linear-gradient(green, green);
+            width: 100px; height: 100px; background-size: 0.2px 0.2px">
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-png.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-png.html
new file mode 100644
index 00000000000..c57f322d232
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-png.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<title>PNG background with near-zero background-size</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-size">
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-image">
+<link rel="match" href="reference/background-size-near-zero-ref.html">
+<div style="background-image: url(support/50x50-green.png);
+            width: 100px; height: 100px; background-size: 0.2px 0.2px">
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-svg.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-svg.html
new file mode 100644
index 00000000000..ff7b9bb491b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/background-size-near-zero-svg.html
@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<title>SVG background with near-zero background-size</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-size">
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-image">
+<link rel="match" href="reference/background-size-near-zero-ref.html">
+<div style="background-image: url(support/50x50-green.svg);
+            width: 100px; height: 100px; background-size: 0.2px 0.2px">
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html
new file mode 100644
index 00000000000..ebd2d860cec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/reference/background-size-near-zero-ref.html
@@ -0,0 +1,2 @@
+<!DOCTYPE html>
+<div style="width: 100px; height: 100px; background: green"></div>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/support/50x50-green.svg b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/support/50x50-green.svg
new file mode 100644
index 00000000000..21af545019d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-size/support/50x50-green.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50">
+    <rect fill="green" width="50" height="50"/>
+</svg>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/grid-layout-properties.html b/tests/wpt/web-platform-tests/css/css-grid/grid-layout-properties.html
index 7cdda674b47..a5376827eb9 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/grid-layout-properties.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/grid-layout-properties.html
@@ -97,7 +97,7 @@
         '<line-names>': ['[a] auto [b] auto [c]', '[a] 50px [b] 50px [c]'],
         '<track-size>.auto': ['auto', '50px'],
         '<track-size>.<track-breadth>.<length>': ['100px', '100px'],
-        '<track-size>.<track-breadth>.<percentage>': ['100%', '50px'],
+        '<track-size>.<track-breadth>.<percentage>': ['100%', '150px'],
         '<track-size>.<track-breadth>.<flex>': ['1fr', '50px'],
         '<track-size>.<track-breadth>.min-content': ['min-content', '50px'],
         '<track-size>.<track-breadth>.max-content': ['max-content', '50px'],
@@ -111,13 +111,13 @@
         'reset': ['none', 'none'],
       },
       'grid-template': {
-        initial: '150px / 50px 50px 50px',
-        'none': ['', '150px / 50px 50px 50px'],
+        initial: 'none',
+        'none': ['', 'none'],
         '<grid-template-rows> / <grid-template-columns>': ['100px 100px / 200px 200px', '100px 100px / 200px 200px'],
         '<line-names>': ['[a] auto [b] auto [c] / [d] auto [e] auto [f]', '[a] auto [b] auto [c] / [d] auto [e] auto [f]'],
         '<string>+': ['"a b" "a b"', '"a b" "a b"'],
         '<string><track-size>+': ['100px / "a b" 50px', '100px / "a b" 50px'],
-        'reset': ['', '150px / 50px 50px 50px'],
+        'reset': ['', 'none'],
       },
       'grid-auto-columns': {
         initial: 'auto',
diff --git a/tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text.https.html b/tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-01.https.html
similarity index 100%
rename from tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text.https.html
rename to tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-01.https.html
diff --git a/tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-02.https.html b/tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-02.https.html
new file mode 100644
index 00000000000..0df74986689
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-layout-api/layout-child/text-02.https.html
@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#layout-children">
+<link rel="match" href="../green-square-ref.html">
+<meta name="assert" content="This test checks that text children are correctly blockified when no other children exist." />
+
+<style>
+/* We have a wrapper in this test to ensure that any text that is positioned
+ * slightly outside the "test" box doesn't affect the rendering.
+ * This wrapper has a 10px inline padding which does the trick. */
+.wrapper {
+  background: green;
+  padding: 0 10px;
+  width: 80px;
+}
+
+.test {
+  --child-expected: ["default"];
+
+  background: red;
+  color: green;
+  width: 80px;
+  --child: default;
+}
+
+@supports (display: layout(test)) {
+  .test {
+    background: green;
+    display: layout(test);
+  }
+}
+</style>
+<script src="/common/reftest-wait.js"></script>
+<script src="/common/worklet-reftest.js"></script>
+
+<div class="wrapper">
+  <div class="test">
+    Text text text
+  </div>
+</div>
+
+<script>
+importWorkletAndTerminateTestAfterAsyncPaint(CSS.layoutWorklet, {url: 'support/layout-child-worklet.js'});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-computed-content.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-computed-content.html
new file mode 100644
index 00000000000..b2df337adcd
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-computed-content.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Pseudo-Elements Test: Computed size of ::marker</title>
+<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
+<link rel="help" href="https://drafts.csswg.org/css-content/#content-property">
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<meta name="assert" content="This test checks that 'content' resolves correctly in ::marker." />
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+<style>
+.no-list > li {
+  display: block;
+}
+.normal::marker {
+  content: normal;
+}
+.string::marker {
+  content: "string";
+}
+.image::marker {
+  content: url("about:invalid");
+}
+.none::marker {
+  content: none;
+}
+</style>
+<div id="log"></div>
+<ol class="list">
+  <li class="default">item</li>
+  <li class="normal">item</li>
+  <li class="string">item</li>
+  <li class="image">item</li>
+  <li class="none">item</li>
+</ol>
+<ol class="no-list">
+  <li class="default">item</li>
+  <li class="normal">item</li>
+  <li class="string">item</li>
+  <li class="image">item</li>
+  <li class="none">item</li>
+</ol>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+const expectations = {
+  default: 'normal',
+  normal: 'normal',
+  string: '"string"',
+  image: 'url("about:invalid")',
+  none: 'none',
+};
+for (const target of document.querySelectorAll('.list > li')) {
+  const {content} = getComputedStyle(target, '::marker');
+  test(() => {
+    debugger;
+    assert_equals(content, expectations[target.className]);
+  }, `Computed 'content' for list-item ::marker, variant ${target.className}`);
+}
+for (const target of document.querySelectorAll('.no-list > li')) {
+  const {content} = getComputedStyle(target, '::marker');
+  test(() => {
+    assert_equals(content, expectations[target.className]);
+  }, `Computed 'content' for non-list-item ::marker, variant ${target.className}`);
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019-ref.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019-ref.html
new file mode 100644
index 00000000000..4b965772536
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019-ref.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Reference: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<style>
+li {
+  display: block;
+}
+</style>
+<ol>
+  <li>inside symbol</li>
+  <li>inside decimal</li>
+  <li>inside string</li>
+  <li>inside image</li>
+</ol>
+<ol>
+  <li>outside symbol</li>
+  <li>outside decimal</li>
+  <li>outside string</li>
+  <li>outside image</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019.html b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019.html
new file mode 100644
index 00000000000..4921ca7d283
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-pseudo/marker-content-019.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Test: ::marker pseudo elements styled with 'content' property</title>
+<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
+<link rel="match" href="marker-content-019-ref.html">
+<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#marker-pseudo">
+<link rel="help" href="https://drafts.csswg.org/css-content/#content-property">
+<meta name="assert" content="Checks that the 'content: none' hides the ::marker.">
+<style>
+::marker {
+  content: none
+}
+.inside {
+  list-style-position: inside;
+}
+.symbol {
+  list-style-type: disc;
+}
+.decimal {
+  list-style-type: decimal;
+}
+.string {
+  list-style-type: "string";
+}
+.image {
+  list-style-image: url("/images/green-100x50.png");
+}
+</style>
+<ol class="inside">
+  <li class="symbol">inside symbol</li>
+  <li class="decimal">inside decimal</li>
+  <li class="string">inside string</li>
+  <li class="image">inside image</li>
+</ol>
+<ol class="outside">
+  <li class="symbol">outside symbol</li>
+  <li class="decimal">outside decimal</li>
+  <li class="string">outside string</li>
+  <li class="image">outside image</li>
+</ol>
diff --git a/tests/wpt/web-platform-tests/css/cssom/CSSStyleSheet-constructable.html b/tests/wpt/web-platform-tests/css/cssom/CSSStyleSheet-constructable.html
index d7be1677f8c..6d1f4ae6519 100644
--- a/tests/wpt/web-platform-tests/css/cssom/CSSStyleSheet-constructable.html
+++ b/tests/wpt/web-platform-tests/css/cssom/CSSStyleSheet-constructable.html
@@ -467,6 +467,19 @@ function attachShadowDiv(host) {
   return shadowDiv;
 }
 
+test(() => {
+  const sheet = new CSSStyleSheet();
+  assert_equals(sheet.cssRules.length, 0);
+
+  sheet.replaceSync(redStyleTexts[0])
+  assert_equals(sheet.cssRules.length, 1);
+  assert_equals(redStyleTexts[0], sheet.cssRules[0].cssText);
+
+  sheet.replaceSync(redStyleTexts[1]);
+  assert_equals(sheet.cssRules.length, 1);
+  assert_equals(redStyleTexts[1], sheet.cssRules[0].cssText);
+}, 'CSSStyleSheet.replaceSync replaces stylesheet text synchronously');
+
 test(() => {
   // Attach a div inside a shadow root with the class ".red".
   const span = document.createElement("span");
@@ -485,7 +498,7 @@ test(() => {
   sheet.insertRule(redStyleTexts[1]);
   assert_equals(sheet.cssRules.length, 2);
   assert_equals(sheet.cssRules[0].cssText, redStyleTexts[1]);
-}, 'CSSStyleSheet.replaceSync replaces stylesheet text synchronously');
+}, 'CSSStyleSheet.replaceSync correctly updates the style of its adopters synchronously');
 
 const import_text = '@import url("support/constructable-import.css");';
 
@@ -497,6 +510,27 @@ test(() => {
   assert_throws("NotAllowedError", () => { (new CSSStyleSheet).insertRule(import_text) });
 }, 'Inserting an @import rule through insertRule on a constructed stylesheet throws an exception');
 
+async_test(t => {
+    const importUrl = "support/constructable-import.css";
+    const sheet = new CSSStyleSheet();
+
+    assert_throws("NotAllowedError", () => { sheet.replaceSync(`@import url("${importUrl}");`) });
+
+    const timeAfterReplaceSync = performance.now();
+    let link = document.createElement("link");
+    link.rel = "stylesheet";
+    link.href = importUrl;
+
+    link.addEventListener("error", t.unreached_func("Load shouldn't fail"));
+    link.addEventListener("load", t.step_func_done(event => {
+      let entries = window.performance.getEntriesByType('resource').filter(entry => entry.name.includes(importUrl));
+      assert_equals(entries.length, 1, "There should be only one entry for the import URL");
+      assert_greater_than_equal(entries[0].startTime, timeAfterReplaceSync, "The entry's start time should be after replaceSync threw");
+      link.remove();
+    }));
+    document.body.appendChild(link);
+}, "CSSStyleSheet.replaceSync should not trigger any loads from @import rules")
+
 promise_test(() => {
   const span = document.createElement("span");
   thirdSection.appendChild(span);
diff --git a/tests/wpt/web-platform-tests/css/requirements.txt b/tests/wpt/web-platform-tests/css/requirements.txt
index ec921e41f89..634dfe62092 100644
--- a/tests/wpt/web-platform-tests/css/requirements.txt
+++ b/tests/wpt/web-platform-tests/css/requirements.txt
@@ -2,5 +2,5 @@ Template-Python==0.1.post1
 html5lib==1.0.1
 lxml==4.1.1
 mercurial==4.5
-six==1.12.0
+six==1.14.0
 webencodings==0.5.1
diff --git a/tests/wpt/web-platform-tests/element-timing/multiple-redirects-TAO.sub.html b/tests/wpt/web-platform-tests/element-timing/multiple-redirects-TAO.sub.html
new file mode 100644
index 00000000000..6800f7cf687
--- /dev/null
+++ b/tests/wpt/web-platform-tests/element-timing/multiple-redirects-TAO.sub.html
@@ -0,0 +1,62 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8" />
+<title>This test validates some Timing-Allow-Origin header usage in multiple redirects.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/element-timing-helpers.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+</head>
+<body>
+<script>
+async_test(t => {
+    assert_precondition(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
+    let destUrl = get_host_info().HTTP_REMOTE_ORIGIN
+        + '/element-timing/resources/multiple-redirects.py?';
+    destUrl += 'redirect_count=2';
+    // The final resource has '*' in TAO header, so will not affect the result.
+    destUrl += '&final_resource=/element-timing/resources/circle-tao.svg';
+    destUrl += '&origin1=' + get_host_info().UNAUTHENTICATED_ORIGIN;
+    destUrl += '&origin2=' + get_host_info().HTTP_REMOTE_ORIGIN;
+    const taoCombinations = [
+        {tao1: location.origin, tao2: location.origin, passes: false},
+        {tao1: location.origin, tao2: get_host_info().HTTP_REMOTE_ORIGIN, passes: false},
+        {tao1: location.origin, tao2: 'null', passes: true},
+        {tao1: location.origin, tao2: '*', passes: true},
+        {tao1: location.origin, tao2: location.origin, passes: false},
+        {tao1: 'null', tao2: '*', passes: false},
+        {tao1: '*', tao2: 'null', passes: true},
+    ];
+    function getURL(item) {
+        return destUrl + '&tao1=' + item.tao1 + '&tao2=' + item.tao2;
+    }
+    taoCombinations.forEach((item, index) => {
+        const image = document.createElement('img');
+        image.src = getURL(item);
+        image.setAttribute('elementtiming', item.passes.toString());
+        image.setAttribute('id', index);
+        document.body.appendChild(image);
+    });
+    let observed = new Array(taoCombinations.length).fill(false);
+    let observedCount = 0;
+    const beforeRender = performance.now();
+    new PerformanceObserver(t.step_func(entries => {
+        entries.getEntries().forEach(e => {
+            const index = parseInt(e.id);
+            assert_false(observed[index]);
+            const item = taoCombinations[index];
+            const url = getURL(item);
+            checkElement(e, url, item.passes.toString(), e.id, item.passes ? beforeRender : 0,
+                document.getElementById(e.id));
+            observed[index] = true;
+            observedCount++;
+            if (observedCount === taoCombinations.length)
+                t.done();
+        });
+    })).observe({entryTypes: ['element']});
+}, 'Cross-origin images with passing/failing TAO should/shouldn\'t have its renderTime set.');
+</script>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/element-timing/multi-redirect-image.html b/tests/wpt/web-platform-tests/element-timing/redirects-tao-star.html
similarity index 99%
rename from tests/wpt/web-platform-tests/element-timing/multi-redirect-image.html
rename to tests/wpt/web-platform-tests/element-timing/redirects-tao-star.html
index 2a12c5f03c4..a93fcd50ac3 100644
--- a/tests/wpt/web-platform-tests/element-timing/multi-redirect-image.html
+++ b/tests/wpt/web-platform-tests/element-timing/redirects-tao-star.html
@@ -18,7 +18,7 @@ async_test(t => {
             + '/resource-timing/resources/multi_redirect.py?';
     destUrl += 'page_origin=' +  get_host_info().HTTP_ORIGIN;
     destUrl += '&cross_origin=' + get_host_info().HTTP_REMOTE_ORIGIN;
-    destUrl += '&final_resource=' + '/element-timing/resources/circle.svg';
+    destUrl += '&final_resource=' + '/element-timing/resources/circle-tao.svg';
     destUrl += '&timing_allow=1';
     destUrl += '&tao_steps=';
     for (let taoSteps=0; taoSteps < 4; taoSteps++) {
diff --git a/tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg b/tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg
new file mode 100644
index 00000000000..209b9f4e5b5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg
@@ -0,0 +1,6 @@
+<?xml version="1.0"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN"
+              "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200">
+    <circle cx="50%" cy="50%" r="80" style="fill:blue;" />
+</svg>
diff --git a/tests/wpt/web-platform-tests/element-timing/resources/circle.svg.headers b/tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg.headers
similarity index 100%
rename from tests/wpt/web-platform-tests/element-timing/resources/circle.svg.headers
rename to tests/wpt/web-platform-tests/element-timing/resources/circle-tao.svg.headers
diff --git a/tests/wpt/web-platform-tests/element-timing/resources/element-timing-helpers.js b/tests/wpt/web-platform-tests/element-timing/resources/element-timing-helpers.js
index b7f2eef5978..cd0a023f04a 100644
--- a/tests/wpt/web-platform-tests/element-timing/resources/element-timing-helpers.js
+++ b/tests/wpt/web-platform-tests/element-timing/resources/element-timing-helpers.js
@@ -6,9 +6,11 @@ function checkElementInternal(entry, expectedUrl, expectedIdentifier, expectedID
   assert_equals(entry.identifier, expectedIdentifier, 'identifier does not match');
   if (beforeRender != 0) {
     // In this case, renderTime is not 0.
+    assert_greater_than(entry.renderTime, 0, 'renderTime should be nonzero');
     assert_equals(entry.startTime, entry.renderTime, 'startTime should equal renderTime');
   } else {
     // In this case, renderTime is 0, so compare to loadTime.
+    assert_equals(entry.renderTime, 0, 'renderTime should be zero');
     assert_equals(entry.startTime, entry.loadTime, 'startTime should equal loadTime');
   }
   assert_equals(entry.duration, 0, 'duration should be 0');
diff --git a/tests/wpt/web-platform-tests/element-timing/resources/multiple-redirects.py b/tests/wpt/web-platform-tests/element-timing/resources/multiple-redirects.py
new file mode 100644
index 00000000000..820b8833998
--- /dev/null
+++ b/tests/wpt/web-platform-tests/element-timing/resources/multiple-redirects.py
@@ -0,0 +1,57 @@
+def main(request, response):
+    """Handler that causes multiple redirections.
+
+    Mandatory parameters:
+    redirect_count - A number which is at least 1 (number of redirects).
+    final_resource - The location of the last redirect.
+
+    For each number i between 1 and |redirect_count| we have the following optional parameters:
+    tao{{i}} - The Timing-Allow-Origin header of the ith response. Default is no header.
+    origin{{i}} - The origin of the ith redirect (i+1 response). Default is location.origin.
+    Note that the origin of the initial request cannot be controlled here
+    and the Timing-Allow-Origin header of the final response cannot be controlled here.
+
+    Example: redirect_count=2&final_resource=miau.png&tao1=*
+
+    Note: |step| is used internally to track the current redirect number.
+    """
+    step = 1
+    if "step" in request.GET:
+        try:
+            step = int(request.GET.first("step"))
+        except ValueError:
+            pass
+
+    redirect_count = int(request.GET.first("redirect_count"))
+    final_resource = request.GET.first("final_resource")
+
+    tao_value = None
+    tao = "tao" + str(step)
+    if tao in request.GET:
+        tao_value = request.GET.first(tao)
+
+    redirect_url = ""
+    origin = "origin" + str(step)
+    if origin in request.GET:
+        redirect_url = request.GET.first(origin)
+
+    if step == redirect_count:
+        redirect_url += final_resource
+    else:
+        redirect_url += "/element-timing/resources/multiple-redirects.py?"
+        redirect_url += "redirect_count=" + str(redirect_count)
+        redirect_url += "&final_resource=" + final_resource
+        for i in range(1, redirect_count + 1):
+            tao = "tao" + str(i)
+            if tao in request.GET:
+                redirect_url += "&" + tao + "=" + request.GET.first(tao)
+            origin = "origin" + str(i)
+            if origin in request.GET:
+                redirect_url += "&" + origin + "=" + request.GET.first(origin)
+        redirect_url += "&step=" + str(step + 1)
+
+    if tao_value:
+        response.headers.set("timing-allow-origin", tao_value)
+
+    response.status = 302
+    response.headers.set("Location", redirect_url)
diff --git a/tests/wpt/web-platform-tests/element-timing/same-origin-redirects.html b/tests/wpt/web-platform-tests/element-timing/same-origin-redirects.html
new file mode 100644
index 00000000000..3527d805f3e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/element-timing/same-origin-redirects.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8" />
+<title>This test validates element timing information for same-origin redirect chain.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/element-timing-helpers.js"></script>
+</head>
+<body>
+<script>
+async_test(t => {
+    assert_precondition(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
+    // First redirect
+    let destUrl = '/common/redirect.py?location='
+    // Second redirect
+    destUrl += '/common/redirect.py?location='
+    // Image without TAO headers.
+    destUrl += '/element-timing/resources/square20.png';
+    let beforeRender;
+    new PerformanceObserver(t.step_func_done(entries => {
+        assert_equals(entries.getEntries().length, 1, 'There should be one entry');
+        const entry = entries.getEntries()[0];
+        checkElement(entry, location.origin + destUrl, 'et', 'id', beforeRender,
+                document.getElementById('id'));
+    })).observe({entryTypes: ['element']});
+    const image = document.createElement('img');
+    image.src = destUrl;
+    image.setAttribute('elementtiming', 'et');
+    image.setAttribute('id', 'id')
+    document.body.appendChild(image);
+    beforeRender = performance.now();
+}, 'Same-origin image redirect without TAO should have its renderTime set.');
+</script>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/html/dom/idlharness.https.html b/tests/wpt/web-platform-tests/html/dom/idlharness.https.html
index 33ad5c6f616..42d521272dd 100644
--- a/tests/wpt/web-platform-tests/html/dom/idlharness.https.html
+++ b/tests/wpt/web-platform-tests/html/dom/idlharness.https.html
@@ -38,7 +38,7 @@ const waitForLoad = new Promise(resolve => { addEventListener('load', resolve);
 
 idl_test(
   ['html'],
-  ['SVG', 'cssom', 'touch-events', 'uievents', 'dom', 'xhr', 'FileAPI'],
+  ['SVG', 'cssom', 'touch-events', 'uievents', 'dom', 'xhr', 'FileAPI', 'mediacapture-streams'],
   async idlArray => {
     self.documentWithHandlers = new Document();
     const handler = function(e) {};
diff --git a/tests/wpt/web-platform-tests/html/interaction/focus/focus-input-type-switch.html b/tests/wpt/web-platform-tests/html/interaction/focus/focus-input-type-switch.html
new file mode 100644
index 00000000000..eeebe488bf6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/interaction/focus/focus-input-type-switch.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Inputs remain focusable upon changing type</title>
+<link rel="help" href="https://wicg.github.io/auxclick">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=981248">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-actions.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<h1>Can still focus on inputs that change types</h1>
+<input type="text" value="123" onfocus="javascript:event.target.type='number'"
+                               onblur="javascript:event.target.type='text'">
+<script>
+promise_test(() => {
+  // Click the input to attempt to focus on it
+  const target = document.querySelector("input");
+  const actions = new test_driver.Actions();
+  return actions.pointerMove(0, 0, {origin: target})
+         .pointerDown({button: actions.ButtonType.LEFT})
+         .pointerUp({button: actions.ButtonType.LEFT})
+         .send()
+         .then(() => assert_equals(document.activeElement, target,
+                                   "The element was correctly focused"));
+}, "Can change an input's type during focus handler without breaking focus");
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/constraints/form-validation-validity-valueMissing.html b/tests/wpt/web-platform-tests/html/semantics/forms/constraints/form-validation-validity-valueMissing.html
index 3229527fabc..223d54cef8d 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/constraints/form-validation-validity-valueMissing.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/constraints/form-validation-validity-valueMissing.html
@@ -23,6 +23,10 @@
       tag: "input",
       types: ["datetime-local"],
       testData: [
+        // Note that several of these datetime strings use a ' ' separator, which
+        // is questionably spec-compliant. See:
+        //   - crbug.com/521871
+        //   - https://github.com/whatwg/html/issues/2276
         {conditions: {required: false, value: ""}, expected: false, name: "[target] The required attribute is not set"},
         {conditions: {required: true, value: "2000-12-10T12:00:00"}, expected: false, name: "[target] Valid local date and time string(2000-12-10T12:00:00)"},
         {conditions: {required: true, value: "2000-12-10 12:00"}, expected: false, name: "[target] Valid local date and time string(2000-12-10 12:00)"},
diff --git a/tests/wpt/web-platform-tests/html/syntax/parsing/zero.html b/tests/wpt/web-platform-tests/html/syntax/parsing/zero.html
new file mode 100644
index 00000000000..9ff793ae7c6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/syntax/parsing/zero.html
@@ -0,0 +1,93 @@
+<!doctype html>
+<meta charset=utf-8>
+<title></title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<body>
+<div></div>
+<script>
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<!-\u0000>";
+        assert_equals(div.firstChild.data, "-\uFFFD");
+    }, "U+0000 should get replaced with U+FFFD after markup declaration hyphen");
+
+
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&\u0000auml;";
+        assert_equals(div.firstChild.data, "&auml;");
+    }, "U+0000 should vanish after ampersand");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&a\u0000uml;";
+        assert_equals(div.firstChild.data, "&auml;");
+    }, "U+0000 should vanish after ampersand and one letter of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&au\u0000ml;";
+        assert_equals(div.firstChild.data, "&auml;");
+    }, "U+0000 should vanish after ampersand and two letters of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&aum\u0000l;";
+        assert_equals(div.firstChild.data, "&auml;");
+    }, "U+0000 should vanish after ampersand and three letters of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&auml\u0000;";
+        assert_equals(div.firstChild.data, "\u00E4;");
+    }, "U+0000 should vanish after semicolonless entity");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "&notin\u0000;";
+        assert_equals(div.firstChild.data, "\u00ACin;");
+    }, "U+0000 should vanish before required semicolon");
+
+
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&\u0000auml;'>";
+        assert_equals(div.firstChild.title, "&\uFFFDauml;");
+    }, "U+0000 should get replaced with U+FFFD after ampersand");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&a\u0000uml;'>";
+        assert_equals(div.firstChild.title, "&a\uFFFDuml;");
+    }, "U+0000 should get replaced with U+FFFD after ampersand and one letter of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&au\u0000ml;'>";
+        assert_equals(div.firstChild.title, "&au\uFFFDml;");
+    }, "U+0000 should get replaced with U+FFFD after ampersand and two letters of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&aum\u0000l;'>";
+        assert_equals(div.firstChild.title, "&aum\uFFFDl;");
+    }, "U+0000 should get replaced with U+FFFD after ampersand and three letters of entity prefix");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&auml\u0000;'>";
+        assert_equals(div.firstChild.title, "\u00E4\uFFFD;");
+    }, "U+0000 should get replaced with U+FFFD after semicolonless entity");
+
+    test(function() {
+        var div = document.getElementsByTagName("div")[0];
+        div.innerHTML = "<span title='&notin\u0000;'>";
+        assert_equals(div.firstChild.title, "&notin\uFFFD;");
+    }, "U+0000 should get replaced with U+FFFD before required semicolon");
+
+
+
+</script>
diff --git a/tests/wpt/web-platform-tests/interfaces/html.idl b/tests/wpt/web-platform-tests/interfaces/html.idl
index 2c0c489315c..374ce8342b0 100644
--- a/tests/wpt/web-platform-tests/interfaces/html.idl
+++ b/tests/wpt/web-platform-tests/interfaces/html.idl
@@ -1904,7 +1904,6 @@ interface mixin GlobalEventHandlers {
   attribute EventHandler onmouseout;
   attribute EventHandler onmouseover;
   attribute EventHandler onmouseup;
-  attribute EventHandler onwheel;
   attribute EventHandler onpause;
   attribute EventHandler onplay;
   attribute EventHandler onplaying;
@@ -1929,6 +1928,7 @@ interface mixin GlobalEventHandlers {
   attribute EventHandler onwebkitanimationiteration;
   attribute EventHandler onwebkitanimationstart;
   attribute EventHandler onwebkittransitionend;
+  attribute EventHandler onwheel;
 };
 
 interface mixin WindowEventHandlers {
diff --git a/tests/wpt/web-platform-tests/interfaces/wai-aria.idl b/tests/wpt/web-platform-tests/interfaces/wai-aria.idl
index c4fbf11409c..f9406b3989b 100644
--- a/tests/wpt/web-platform-tests/interfaces/wai-aria.idl
+++ b/tests/wpt/web-platform-tests/interfaces/wai-aria.idl
@@ -21,6 +21,7 @@ interface mixin AriaAttributes {
   attribute FrozenArray<Element>? ariaControlsElements;
   attribute DOMString? ariaCurrent;
   attribute FrozenArray<Element>? ariaDescribedByElements;
+  attribute DOMString? ariaDescription;
   attribute Element? ariaDetailsElement;
   attribute DOMString? ariaDisabled;
   attribute Element? ariaErrorMessageElement;
diff --git a/tests/wpt/web-platform-tests/largest-contentful-paint/multi-redirects-TAO.html b/tests/wpt/web-platform-tests/largest-contentful-paint/redirects-tao-star.html
similarity index 87%
rename from tests/wpt/web-platform-tests/largest-contentful-paint/multi-redirects-TAO.html
rename to tests/wpt/web-platform-tests/largest-contentful-paint/redirects-tao-star.html
index 4e462c729aa..0667266e6d2 100644
--- a/tests/wpt/web-platform-tests/largest-contentful-paint/multi-redirects-TAO.html
+++ b/tests/wpt/web-platform-tests/largest-contentful-paint/redirects-tao-star.html
@@ -2,7 +2,7 @@
 <html>
 <head>
 <meta charset="utf-8" />
-<title>This test validates LargestContenfulPaint information for cross-origin redirect chain images.</title>
+<title>This test validates LargestContentfulPaint information for cross-origin redirect chain images.</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 <script src="resources/largest-contentful-paint-helpers.js"></script>
@@ -11,14 +11,12 @@
 <body>
 <script>
 async_test(t => {
-    if (!window.LargestContentfulPaint) {
-      assert_unreached("LargestContentfulPaint is not implemented");
-    }
+    assert_precondition(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
     let destUrl = get_host_info().HTTP_REMOTE_ORIGIN
             + '/resource-timing/resources/multi_redirect.py?';
     destUrl += 'page_origin=' +  get_host_info().HTTP_ORIGIN;
     destUrl += '&cross_origin=' + get_host_info().HTTP_REMOTE_ORIGIN;
-    destUrl += '&final_resource=' + '/element-timing/resources/circle.svg';
+    destUrl += '&final_resource=' + '/element-timing/resources/circle-tao.svg';
     destUrl += '&timing_allow=1';
     destUrl += '&tao_steps=';
 
diff --git a/tests/wpt/web-platform-tests/largest-contentful-paint/same-origin-redirects.html b/tests/wpt/web-platform-tests/largest-contentful-paint/same-origin-redirects.html
new file mode 100644
index 00000000000..e17fdbb69e6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/largest-contentful-paint/same-origin-redirects.html
@@ -0,0 +1,35 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<meta charset="utf-8" />
+<title>This test validates LargestContentfulPaint for same-origin redirect chain.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/largest-contentful-paint-helpers.js"></script>
+</head>
+<body>
+<script>
+async_test(t => {
+    assert_precondition(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
+    // First redirect
+    let destUrl = '/common/redirect.py?location='
+    // Second redirect
+    destUrl += '/common/redirect.py?location='
+    // Image without TAO headers.
+    destUrl += '/element-timing/resources/square20.png';
+    let beforeLoad;
+    new PerformanceObserver(t.step_func_done(entries => {
+        assert_equals(entries.getEntries().length, 1, 'There should be one entry');
+        const entry = entries.getEntries()[0];
+        checkImage(entry, location.origin + destUrl, 'id', 20*20, beforeLoad);
+    })).observe({entryTypes: ['largest-contentful-paint']});
+    const image = document.createElement('img');
+    image.src = destUrl;
+    image.setAttribute('id', 'id')
+    document.body.appendChild(image);
+    beforeLoad = performance.now();
+}, 'Same-origin image redirect without TAO should have its renderTime set.');
+</script>
+</body>
+</html>
+
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-disabled-tracks.https.html b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-disabled-tracks.https.html
index 52e0010cfef..b98aed23668 100644
--- a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-disabled-tracks.https.html
+++ b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-disabled-tracks.https.html
@@ -30,7 +30,7 @@
       const recorderOnError = test.unreached_func('Recording error.');
 
       const gotStream = test.step_func(function(stream) {
-        for (track in stream.getTracks())
+        for (track of stream.getTracks())
           track.enabled = false;
 
         recorder = new MediaRecorder(stream);
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-mimetype.html b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-mimetype.html
index e90bbcced98..06841aea9e6 100644
--- a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-mimetype.html
+++ b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-mimetype.html
@@ -1,8 +1,8 @@
 <!doctype html>
 <html>
 <head>
-  <title>MediaRecorder MIMEType</title>
-  <link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimetype">
+  <title>MediaRecorder mimeType</title>
+  <link rel="help" href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
   <script src="/resources/testharness.js"></script>
   <script src="/resources/testharnessreport.js"></script>
 </head>
@@ -47,39 +47,39 @@ function createAudioVideoStream(t) {
 test(t => {
   const recorder = new MediaRecorder(createAudioStream(t));
   assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no default MIMEtype");
-}, "MediaRecorder sets no default MIMEType in the constructor for audio");
+    "MediaRecorder has no default mimeType");
+}, "MediaRecorder sets no default mimeType in the constructor for audio");
 
 test(t => {
   const recorder = new MediaRecorder(createVideoStream(t));
   assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no default MIMEtype");
-}, "MediaRecorder sets no default MIMEType in the constructor for video");
+    "MediaRecorder has no default mimeType");
+}, "MediaRecorder sets no default mimeType in the constructor for video");
 
 test(t => {
   const stream = createAudioVideoStream(t);
   const recorder = new MediaRecorder(stream);
   assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no default MIMEtype");
-}, "MediaRecorder sets no default MIMEType in the constructor for audio/video");
+    "MediaRecorder has no default mimeType");
+}, "MediaRecorder sets no default mimeType in the constructor for audio/video");
 
 test(t => {
   assert_throws("NotSupportedError",
     () => new MediaRecorder(new MediaStream(), {mimeType: "audio/banana"}));
-}, "MediaRecorder invalid audio MIMEType throws");
+}, "MediaRecorder invalid audio mimeType throws");
 
 test(t => {
   assert_false(MediaRecorder.isTypeSupported("audio/banana"));
-}, "MediaRecorder invalid audio MIMEType is unsupported");
+}, "MediaRecorder invalid audio mimeType is unsupported");
 
 test(t => {
   assert_throws("NotSupportedError",
     () => new MediaRecorder(new MediaStream(), {mimeType: "video/pineapple"}));
-}, "MediaRecorder invalid video MIMEType throws");
+}, "MediaRecorder invalid video mimeType throws");
 
 test(t => {
   assert_false(MediaRecorder.isTypeSupported("video/pineapple"));
-}, "MediaRecorder invalid video MIMEType is unsupported");
+}, "MediaRecorder invalid video mimeType is unsupported");
 
 // New MIME types could be added to this list as needed.
 for (const mimeType of [
@@ -104,66 +104,138 @@ for (const mimeType of [
   if (MediaRecorder.isTypeSupported(mimeType)) {
     test(t => {
       const recorder = new MediaRecorder(new MediaStream(), {mimeType});
-      assert_equals(recorder.mimeType, mimeType, "Supported MIMEType is set");
-    }, `Supported MIMEType ${mimeType} is set immediately after constructing`);
+      assert_equals(recorder.mimeType, mimeType, "Supported mimeType is set");
+    }, `Supported mimeType ${mimeType} is set immediately after constructing`);
   } else {
     test(t => {
       assert_throws("NotSupportedError",
         () => new MediaRecorder(new MediaStream(), {mimeType}));
-    }, `Unsupported MIMEType ${mimeType} throws`);
+    }, `Unsupported mimeType ${mimeType} throws`);
   }
 }
 
 promise_test(async t => {
   const recorder = new MediaRecorder(createAudioStream(t));
   recorder.start();
-  assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no MIMEtype after start() for audio");
-
   await new Promise(r => recorder.onstart = r);
-  assert_not_equals(recorder.mimeType, "",
-    "MediaRecorder has a MIMEtype after 'start' for audio");
-  assert_regexp_match(recorder.mimeType, /^audio\//,
-    "MIMEtype has an expected media type");
-  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
-    "MIMEtype has a container subtype");
-  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+$/,
-    "MIMEtype has one codec");
-}, "MediaRecorder sets a MIMEType after 'start' for audio");
+  assert_not_equals(recorder.mimeType, "");
+}, "MediaRecorder sets a nonempty mimeType on 'onstart' for audio");
 
 promise_test(async t => {
   const recorder = new MediaRecorder(createVideoStream(t));
   recorder.start();
-  assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no MIMEtype after start() for video");
-
   await new Promise(r => recorder.onstart = r);
-  assert_not_equals(recorder.mimeType, "",
-    "MediaRecorder has a MIMEtype after 'start' for video");
-  assert_regexp_match(recorder.mimeType, /^video\//,
-    "MIMEtype has an expected media type");
-  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
-    "MIMEtype has a container subtype");
-  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+$/,
-    "MIMEtype has one codec");
-}, "MediaRecorder sets a MIMEType after 'start' for video");
+  assert_not_equals(recorder.mimeType, "");
+}, "MediaRecorder sets a nonempty mimeType on 'onstart' for video");
 
 promise_test(async t => {
   const recorder = new MediaRecorder(createAudioVideoStream(t));
   recorder.start();
-  assert_equals(recorder.mimeType, "",
-    "MediaRecorder has no MIMEtype after start() for audio/video");
-
   await new Promise(r => recorder.onstart = r);
-  assert_not_equals(recorder.mimeType, "",
-    "MediaRecorder has a MIMEtype after 'start' for audio/video");
-  assert_regexp_match(recorder.mimeType, /^video\//,
-    "MIMEtype has an expected media type");
+  assert_not_equals(recorder.mimeType, "");
+}, "MediaRecorder sets a nonempty mimeType on 'onstart' for audio/video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioStream(t));
+  recorder.start();
+  assert_equals(recorder.mimeType, "");
+}, "MediaRecorder mimeType is not set before 'onstart' for audio");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createVideoStream(t));
+  recorder.start();
+  assert_equals(recorder.mimeType, "");
+}, "MediaRecorder mimeType is not set before 'onstart' for video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioVideoStream(t));
+  recorder.start();
+  assert_equals(recorder.mimeType, "");
+}, "MediaRecorder mimeType is not set before 'onstart' for audio/video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioStream(t));
+  const onstartPromise = new Promise(resolve => {
+    recorder.onstart = () => {
+      recorder.onstart = () => t.step_func(() => {
+        assert_not_reached("MediaRecorder doesn't fire 'onstart' twice");
+      });
+      resolve();
+    }
+  });
+  recorder.start();
+  await onstartPromise;
+  await new Promise(r => t.step_timeout(r, 1000));
+}, "MediaRecorder doesn't fire 'onstart' multiple times for audio");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createVideoStream(t));
+  const onstartPromise = new Promise(resolve => {
+    recorder.onstart = () => {
+      recorder.onstart = () => t.step_func(() => {
+        assert_not_reached("MediaRecorder doesn't fire 'onstart' twice");
+      });
+      resolve();
+    }
+  });
+  recorder.start();
+  await onstartPromise;
+  await new Promise(r => t.step_timeout(r, 1000));
+}, "MediaRecorder doesn't fire 'onstart' multiple times for video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioVideoStream(t));
+  const onstartPromise = new Promise(resolve => {
+    recorder.onstart = () => {
+      recorder.onstart = () => t.step_func(() => {
+        assert_not_reached("MediaRecorder doesn't fire 'onstart' twice");
+      });
+      resolve();
+    }
+  });
+  recorder.start();
+  await onstartPromise;
+  await new Promise(r => t.step_timeout(r, 1000));
+}, "MediaRecorder doesn't fire 'onstart' multiple times for audio/video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioStream(t));
+  recorder.start();
+  await new Promise(r => recorder.onstart = r);
+  assert_regexp_match(recorder.mimeType, /^audio\//,
+    "mimeType has an expected media type");
   assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
-    "MIMEtype has a container subtype");
-  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+; codecs=[^,]+,[^,]+$/,
-    "MIMEtype has two codecs");
-}, "MediaRecorder sets a MIMEType after 'start' for audio/video");
+    "mimeType has a container subtype");
+  assert_regexp_match(
+    recorder.mimeType, /^[a-z]+\/[a-z]+;[ ]*codecs=[^,]+$/,
+    "mimeType has one codec a");
+}, "MediaRecorder formats mimeType well after 'start' for audio");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createVideoStream(t));
+  recorder.start();
+  await new Promise(r => recorder.onstart = r);
+  assert_regexp_match(recorder.mimeType, /^video\//,
+    "mimeType has an expected media type");
+  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
+    "mimeType has a container subtype");
+  assert_regexp_match(
+    recorder.mimeType, /^[a-z]+\/[a-z]+;[ ]*codecs=[^,]+$/,
+    "mimeType has one codec a");
+}, "MediaRecorder formats mimeType well after 'start' for video");
+
+promise_test(async t => {
+  const recorder = new MediaRecorder(createAudioVideoStream(t));
+  recorder.start();
+  await new Promise(r => recorder.onstart = r);
+  assert_regexp_match(recorder.mimeType, /^video\//,
+    "mimeType has an expected media type");
+  assert_regexp_match(recorder.mimeType, /^[a-z]+\/[a-z]+/,
+    "mimeType has a container subtype");
+  assert_regexp_match(
+    recorder.mimeType, /^[a-z]+\/[a-z]+;[ ]*codecs=[^,]+,[^,]+$/,
+    "mimeType has two codecs");
+}, "MediaRecorder formats mimeType well after 'start' for audio/video");
 </script>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-no-sink.https.html b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-no-sink.https.html
new file mode 100644
index 00000000000..7f5ff934fad
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-no-sink.https.html
@@ -0,0 +1,42 @@
+<!doctype html>
+<html>
+
+<head>
+  <title>MediaRecorder peer connection</title>
+  <link rel="help"
+        href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="utils/peerconnection.js"></script>
+</head>
+
+<body>
+  <script>
+
+[{name: "audio",        kind: {audio: true, video: false}},
+ {name: "video",        kind: {audio: false, video: true}},
+ {name: "audio/video",  kind: {audio: true, video: true}}].forEach(args => {
+  promise_test(async t => {
+    const [localPc, remotePc, stream] = await startConnection(
+        t, args.kind.audio, args.kind.video);
+    const recorder = new MediaRecorder(stream);
+    // Set an arbitrary timeslice interval so the ondataavailable event
+    // handler gets invoked repeatedly. Without it, the test would
+    // deadlock as it's currently written.
+    recorder.start(100);
+    let combinedSize = 0;
+    const dataPromise = new Promise(r => recorder.ondataavailable = e => {
+      // Wait for an arbitrary amount of data to appear before we resolve.
+      combinedSize += e.data.size;
+      if (combinedSize > 4711) r();
+    });
+    await dataPromise;
+    recorder.stop();
+  }, "PeerConnection MediaRecorder records " + args.name +
+     " from PeerConnection without sinks");
+ });
+
+  </script>
+</body>
+
+</html>
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html
new file mode 100644
index 00000000000..88e9da78a7a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-peerconnection.https.html
@@ -0,0 +1,73 @@
+<!doctype html>
+<html>
+<meta name="timeout" content="long">
+
+<head>
+  <title>MediaRecorder peer connection</title>
+  <link rel="help"
+        href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="utils/peerconnection.js"></script>
+</head>
+
+<body>
+  <video id="remote" autoplay width="240" />
+  <script>
+
+[{ name: "video", kind: { video: true, audio: false }, mimeType: "" },
+ { name: "audio", kind: { video: false, audio: true }, mimeType: "" },
+ { name: "audio/video", kind: { video: true, audio: true }, mimeType: "" },
+ { name: "audio", kind: { video: false, audio: true }, mimeType: "video/webm;codecs=vp8" },
+ { name: "video", kind: { video: true, audio: false }, mimeType: "video/webm;codecs=vp8" },
+ { name: "audio/video", kind: { video: true, audio: true }, mimeType: "video/webm;codecs=vp8" },
+ { name: "audio", kind: { video: false, audio: true }, mimeType: "video/webm;codecs=vp9" },
+ { name: "video", kind: { video: true, audio: false }, mimeType: "video/webm;codecs=vp9" },
+ { name: "audio/video", kind: { video: true, audio: true }, mimeType: "video/webm;codecs=vp9" }]
+  .forEach(args => {
+    const formatString = JSON.stringify(args.kind) +
+        " with format " + (args.mimeType ? args.mimeType : "[passthrough]") + ".";
+    promise_test(async t => {
+      const [localPc, remotePc, stream] = await startConnection(
+          t, args.kind.audio, args.kind.video);
+      const recorder = new MediaRecorder(stream, { mimeType: args.mimeType });
+      let combinedSize = 0;
+      const dataPromise = new Promise(r => {
+        recorder.onstart = () => {
+          recorder.ondataavailable = e => {
+            // Wait for an arbitrary amount of data to appear before we resolve.
+            combinedSize += e.data.size;
+            if (combinedSize > 4711) r();
+          }
+        }
+      });
+      recorder.start(100);
+      await dataPromise;
+      recorder.stop();
+    }, "PeerConnection MediaRecorder receives data after onstart, " +
+          formatString);
+
+    promise_test(async t => {
+      const [localPc, remotePc, stream] = await startConnection(
+          t, args.kind.audio, args.kind.video);
+      const recorder = new MediaRecorder(stream, { mimeType: args.mimeType });
+      const stopPromise = new Promise(r => recorder.onstop = r);
+      const dataPromise = new Promise(r => recorder.ondataavailable = r);
+      recorder.start();
+      await waitForReceivedFrames(
+        t, remotePc, args.kind.audio, args.kind.video, 10);
+      for (transceiver of remotePc.getTransceivers())
+        transceiver.receiver.track.stop();
+      // As the tracks ended, we'd like to see data from the recorder.
+      // For details:
+      // https://www.w3.org/TR/mediastream-recording/#mediarecorder-methods.
+      await dataPromise;
+      await stopPromise;
+    }, "PeerConnection MediaRecorder gets ondata on stopping recorded " +
+            "tracks " + formatString);
+  });
+
+  </script>
+</body>
+
+</html>
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-stop.html b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-stop.html
index 1cc18f4c854..bda5d871d04 100644
--- a/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-stop.html
+++ b/tests/wpt/web-platform-tests/mediacapture-record/MediaRecorder-stop.html
@@ -24,6 +24,20 @@
         return arr;
     }
 
+    // This function is used to check that elements of |actual| is a sub
+    // sequence in the |expected| sequence.
+    function assertSequenceIn(actual, expected) {
+      let i = 0;
+      for (event of actual) {
+        const j = expected.slice(i).indexOf(event);
+        assert_greater_than_equal(
+            j, 0, "Sequence element " + event + " is not included in " +
+            expected.slice(i));
+        i = j;
+      }
+      return true;
+    }
+
     promise_test(async t => {
         let video = createVideoStream();
         let recorder = new MediaRecorder(video);
@@ -40,8 +54,10 @@
         assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
         assert_equals(recorder.state, "inactive", "MediaRecorder is inactive after stop event");
 
-        assert_array_equals(events, ["start", "dataavailable", "stop"],
-            "Should have gotten expected events");
+        // As the test is written, it's not guaranteed that
+        // onstart/ondataavailable is invoked, but it's fine if they are.
+        // The stop element is guaranteed to be in events when we get here.
+        assertSequenceIn(events, ["start", "dataavailable", "stop"]);
     }, "MediaRecorder will stop recording and fire a stop event when all tracks are ended");
 
     promise_test(async t => {
@@ -59,8 +75,10 @@
         assert_true(event.isTrusted, "isTrusted should be true when the event is created by C++");
         assert_equals(recorder.state, "inactive", "MediaRecorder is inactive after stop event");
 
-        assert_array_equals(events, ["start", "dataavailable", "stop"],
-            "Should have gotten expected events");
+        // As the test is written, it's not guaranteed that
+        // onstart/ondataavailable is invoked, but it's fine if they are.
+        // The stop element is guaranteed to be in events when we get here.
+        assertSequenceIn(events, ["start", "dataavailable", "stop"]);
     }, "MediaRecorder will stop recording and fire a stop event when stop() is called");
 
     promise_test(async t => {
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/passthrough/MediaRecorder-passthrough.https.html b/tests/wpt/web-platform-tests/mediacapture-record/passthrough/MediaRecorder-passthrough.https.html
new file mode 100644
index 00000000000..655b7a11923
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mediacapture-record/passthrough/MediaRecorder-passthrough.https.html
@@ -0,0 +1,61 @@
+<!doctype html>
+<html>
+
+<head>
+  <title>MediaRecorder peer connection</title>
+  <link rel="help"
+        href="https://w3c.github.io/mediacapture-record/MediaRecorder.html#dom-mediarecorder-mimeType">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="../utils/peerconnection.js"></script>
+</head>
+
+<body>
+  <video id="remote" autoplay width="240" />
+  <script>
+
+[{kind: "video", audio: false, codecPreference: "VP8", codecRegex: /.*vp8.*/},
+ {kind: "audio/video", audio: true, codecPreference: "VP8", codecRegex: /.*vp8.*/},
+ {kind: "video", audio: false, codecPreference: "VP9", codecRegex: /.*vp9.*/},
+ {kind: "audio/video", audio: true, codecPreference: "VP9", codecRegex: /.*vp9.*/}]
+  .forEach(args => {
+    promise_test(async t => {
+      const [localPc, remotePc, stream] = await startConnection(
+          t, args.audio, /*video=*/true, args.codecPreference);
+      const recorder = new MediaRecorder(stream);  // Passthrough.
+      const onstartPromise = new Promise(resolve => {
+        recorder.onstart = t.step_func(() => {
+          assert_regexp_match(
+                recorder.mimeType, args.codecRegex,
+                "mimeType is matching " + args.codecPreference +
+                " in case of passthrough.");
+          resolve();
+        });
+      });
+      recorder.start();
+      await(onstartPromise);
+    }, "PeerConnection passthrough MediaRecorder receives " +
+          args.codecPreference + " after onstart with a " + args.kind +
+          " stream.");
+  });
+
+promise_test(async t => {
+  const [localPc, remotePc, stream, transceivers] = await startConnection(
+      t, /*audio=*/false, /*video=*/true, /*videoCodecPreference=*/"VP8");
+  const recorder = new MediaRecorder(stream);  // Possibly passthrough.
+  recorder.start();
+  await waitForReceivedFrames(t, remotePc, false, true, 10);
+
+  // Switch codec to VP9; we expect onerror to not be invoked.
+  recorder.onerror = t.step_func(() => assert_unreached(
+      "MediaRecorder should be prepared to handle codec switches"));
+  setTransceiverCodecPreference(transceivers.video, "VP9");
+  exchangeOfferAnswer(localPc, remotePc);
+  await waitForReceivedCodec(t, remotePc, "VP9");
+}, "PeerConnection passthrough MediaRecorder should be prepared to handle " +
+        "the codec switching from VP8 to VP9");
+
+</script>
+</body>
+
+</html>
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js b/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
new file mode 100644
index 00000000000..817095e981f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
@@ -0,0 +1,156 @@
+/**
+ * @fileoverview Utility functions for tests utilizing PeerConnections
+ */
+
+/**
+ * Exchanges offers and answers between two peer connections.
+ *
+ * pc1's offer is set as local description in pc1 and
+ * remote description in pc2. After that, pc2's answer
+ * is set as it's local description and remote description in pc1.
+ *
+ * @param {!RTCPeerConnection} pc1 The first peer connection.
+ * @param {!RTCPeerConnection} pc2 The second peer connection.
+ */
+async function exchangeOfferAnswer(pc1, pc2) {
+  await pc1.setLocalDescription(await pc1.createOffer());
+  await pc2.setRemoteDescription(pc1.localDescription);
+  await pc2.setLocalDescription(await pc2.createAnswer());
+  await pc1.setRemoteDescription(pc2.localDescription);
+}
+
+/**
+ * Sets the specified codec preference if it's included in the transceiver's
+ * list of supported codecs.
+ * @param {!RTCRtpTransceiver} transceiver The RTP transceiver.
+ * @param {string} codecPreference The codec preference.
+ */
+function setTransceiverCodecPreference(transceiver, codecPreference) {
+  for (let codec of RTCRtpSender.getCapabilities('video').codecs) {
+    if (codec.mimeType.includes(codecPreference)) {
+      transceiver.setCodecPreferences([codec]);
+      return;
+    }
+  }
+}
+
+/**
+ * Starts a connection between two peer connections, using a audio and/or video
+ * stream.
+ * @param {*} t Test instance.
+ * @param {boolean} useAudio True if audio should be used.
+ * @param {boolean} useVideo True if video should be used.
+ * @param {string} [videoCodecPreference] String containing the codec preference.
+ * @returns an array with the two connected peer connections, the remote stream,
+ * and the list of transceivers.
+ */
+async function startConnection(t, useAudio, useVideo, videoCodecPreference) {
+  const stream = await navigator.mediaDevices.getUserMedia({
+    audio: useAudio, video: useVideo
+  });
+  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+  let transceivers = {};
+  stream.getTracks().forEach(track => {
+    const transceiver = pc1.addTransceiver(track);
+    transceivers[track.kind] = transceiver;
+    if (videoCodecPreference && track.kind == 'video') {
+      setTransceiverCodecPreference(transceiver, videoCodecPreference);
+    }
+  });
+  function doExchange(localPc, remotePc) {
+    localPc.addEventListener('icecandidate', event => {
+      const { candidate } = event;
+      if (candidate && remotePc.signalingState !== 'closed') {
+        remotePc.addIceCandidate(candidate);
+      }
+    });
+  }
+  doExchange(pc1, pc2);
+  doExchange(pc2, pc1);
+  exchangeOfferAnswer(pc1, pc2);
+  const remoteStream = await new Promise(resolve => {
+    let tracks = [];
+    pc2.ontrack = e => {
+      tracks.push(e.track)
+      if (tracks.length < useAudio + useVideo) return;
+      const stream = new MediaStream(tracks);
+      // The srcObject sink is needed for the tests to get exercised in Chrome.
+      const remoteVideo = document.getElementById('remote');
+      if (remoteVideo) {
+        remoteVideo.srcObject = stream;
+      }
+      resolve(stream)
+    }
+  });
+  return [pc1, pc2, remoteStream, transceivers]
+}
+
+/**
+ * Given a peer connection, return after at least numFramesOrPackets
+ * frames (video) or packets (audio) have been received.
+ * @param {*} t Test instance.
+ * @param {!RTCPeerConnection} pc The peer connection.
+ * @param {boolean} lookForAudio True if audio packets should be waited for.
+ * @param {boolean} lookForVideo True if video packets should be waited for.
+ * @param {int} numFramesOrPackets Number of frames (video) and packets (audio)
+ * to wait for.
+ */
+async function waitForReceivedFrames(
+    t, pc, lookForAudio, lookForVideo, numFramesOrPackets) {
+  let initialAudioPackets = 0;
+  let initialVideoFrames = 0;
+  while (lookForAudio || lookForVideo) {
+    const report = await pc.getStats();
+    report.forEach(stats => {
+      if (stats.type && stats.type == 'inbound-rtp') {
+        if (lookForAudio && stats.kind == 'audio') {
+          if (!initialAudioPackets) {
+            initialAudioPackets = stats.packetsReceived
+          } else if (stats.packetsReceived > initialAudioPackets +
+                     numFramesOrPackets) {
+            lookForAudio = false;
+          }
+        }
+        if (lookForVideo && stats.kind == 'video') {
+          if (!initialVideoFrames) {
+            initialVideoFrames = stats.framesDecoded;
+          } else if (stats.framesDecoded > initialVideoFrames +
+                     numFramesOrPackets) {
+            lookForVideo = false;
+          }
+        }
+      }
+    });
+    await new Promise(r => { t.step_timeout(r, 100); });
+  }
+}
+
+/**
+ * Given a peer connection, return after one of its inbound RTP connections
+ * includes use of the specified codec.
+ * @param {*} t Test instance.
+ * @param {!RTCPeerConnection} pc The peer connection.
+ * @param {string} codecToLookFor The waited-for codec.
+ */
+async function waitForReceivedCodec(t, pc, codecToLookFor) {
+  let currentCodecId;
+  for (;;) {
+    const report = await pc.getStats();
+    report.forEach(stats => {
+      if (stats.id) {
+        if (stats.type == 'inbound-rtp' && stats.kind == 'video') {
+          currentCodecId = stats.codecId;
+        } else if (currentCodecId && stats.id == currentCodecId &&
+                   stats.mimeType.toLowerCase().includes(
+                      codecToLookFor.toLowerCase())) {
+          return;
+        }
+      }
+    });
+    await new Promise(r => { t.step_timeout(r, 100); });
+  }
+}
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html
new file mode 100644
index 00000000000..88d72446392
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Commas in "content_security/policy" cause parse errors and thus no CSP</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html.headers
new file mode 100644
index 00000000000..32e453ab20d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/comma-in-policy.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-comma-in-policy
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html
new file mode 100644
index 00000000000..99046803c9f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Of two "content_security" items only the second counts</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true, img: false });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html.headers
new file mode 100644
index 00000000000..a380b053c27
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/double-content-security.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-double-content-security
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html
new file mode 100644
index 00000000000..925b9d5a31e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Of two "content_security/policies" items only the second counts</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true, img: false });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html.headers
new file mode 100644
index 00000000000..23f1d143405
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/double-policies.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-double-policies
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/helper.js b/tests/wpt/web-platform-tests/origin-policy/content-security/helper.js
new file mode 100644
index 00000000000..4875977afa4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/helper.js
@@ -0,0 +1,73 @@
+window.waitForOneSecurityPolicyViolationEvent = expectedBlockedURI => {
+  return new Promise(resolve => {
+    let eventCount = 0;
+    let blockedURI = null;
+
+    document.addEventListener("securitypolicyviolation", e => {
+      ++eventCount;
+      blockedURI = e.blockedURI;
+
+      // We want to test that only one event is fired, but we want to do so
+      // without waiting indefinitely. By waiting for one tick, we at least
+      // ensure that there's no bug that leads to two securitypolicyviolation
+      // events being fired at the same time, as a result of the one violation.
+      step_timeout(() => {
+        assert_equals(eventCount, 1);
+        resolve(blockedURI);
+      });
+    });
+  });
+};
+
+window.waitForImgFail = imgSrc => {
+  return new Promise((resolve, reject) => {
+    const img = document.createElement("img");
+    img.onload = () => reject(new Error("Must not load the image"));
+    img.onerror = () => resolve();
+
+    img.src = imgSrc;
+    document.body.append(img);
+  });
+};
+
+
+window.waitForImgSuccess = imgSrc => {
+  return new Promise((resolve, reject) => {
+    const img = document.createElement("img");
+    img.onload = () => resolve();
+    img.onerror = () => reject(new Error("Must load the image"));
+
+    img.src = imgSrc;
+    document.body.append(img);
+  });
+};
+
+// Both params are optional; if they are not given as booleans then we will not test that aspect.
+window.runCSPTest = ({ unsafeEval, img }) => {
+  if (unsafeEval === true) {
+    test(() => {
+      eval("window.evalAllowed = true;");
+      assert_equals(window.evalAllowed, true);
+    }, "eval must be allowed");
+  } else if (unsafeEval === false) {
+    test(() => {
+      try {
+        eval("window.evalAllowed = true;");
+      } catch (e) { }
+
+      assert_equals(window.evalAllowed, undefined);
+    }, "eval must be disallowed");
+  }
+
+  if (img === true) {
+    promise_test(
+      () => waitForImgSuccess("/common/security-features/subresource/image.py"),
+      "img loading must be allowed"
+    );
+  } else if (img === false) {
+    promise_test(
+      () => waitForImgFail("/common/security-features/subresource/image.py"),
+      "img loading must be disallowed"
+    );
+  }
+};
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html
new file mode 100644
index 00000000000..78a67e16eb9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Non-array "content_security/policies" member must be ignored</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html.headers
new file mode 100644
index 00000000000..31e6f375ef9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-array.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-non-array
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html
new file mode 100644
index 00000000000..359c6c76922
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Non-object "content_security" member must be ignored</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html.headers
new file mode 100644
index 00000000000..812ea9445ec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-object.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-non-object
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html
new file mode 100644
index 00000000000..8af3c1c4dff
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Non-string "content_security/policies" array member must be ignored</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: true });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html.headers
new file mode 100644
index 00000000000..0b9ce2ee3f8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/non-string.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-non-string
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html
new file mode 100644
index 00000000000..3e5038b501d
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>CSP via origin policy must trigger a securitypolicyviolation event even when the CSP is report-only</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+
+promise_test(() => {
+  const imgURL = (new URL("/common/security-features/subresource/image.py", document.location)).href;
+
+  return Promise.all([
+    waitForOneSecurityPolicyViolationEvent(imgURL).then(blockedURI => {
+      assert_equals(blockedURI, imgURL);
+    }),
+    waitForImgSuccess(imgURL)
+  ]);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html.headers
new file mode 100644
index 00000000000..cb27e1500e0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report-report-only.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-noimg-report-only
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html
new file mode 100644
index 00000000000..22beca5a3db
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>CSP via origin policy must trigger a securitypolicyviolation event</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+
+promise_test(() => {
+  const imgURL = (new URL("/common/security-features/subresource/image.py", document.location)).href;
+
+  return Promise.all([
+    waitForOneSecurityPolicyViolationEvent(imgURL).then(blockedURI => {
+      assert_equals(blockedURI, imgURL);
+    }),
+    waitForImgFail(imgURL)
+  ]);
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html.headers
new file mode 100644
index 00000000000..08bcb9fa941
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/trigger-violation-report.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-noimg
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html
new file mode 100644
index 00000000000..bc9ebd0cccf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>"content_security/policy" can contain multiple array items to enforce multiple CSPs</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: false, img: false });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html.headers
new file mode 100644
index 00000000000..eeddaba7a59
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-multi-item-array.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-valid-with-semicolon
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html
new file mode 100644
index 00000000000..82158f1cf70
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>"content_security/policy" array items can contain semicolons to enforce multiple CSP directives</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<body>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: false, img: false });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html.headers
new file mode 100644
index 00000000000..eeddaba7a59
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid-with-semicolon.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-valid-with-semicolon
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html b/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html
new file mode 100644
index 00000000000..36e5ddbf958
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<meta charset="utf-8">
+<title>Valid "content_security" member disallows eval</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="helper.js"></script>
+
+<script>
+"use strict";
+runCSPTest({ unsafeEval: false });
+</script>
diff --git a/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html.headers b/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html.headers
new file mode 100644
index 00000000000..78aeeacd934
--- /dev/null
+++ b/tests/wpt/web-platform-tests/origin-policy/content-security/valid.https.html.headers
@@ -0,0 +1 @@
+Sec-Origin-Policy: policy=policy-content-security-valid
diff --git a/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html b/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html
deleted file mode 100644
index 24ee8999054..00000000000
--- a/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE HTML>
-<html>
-<head>
-  <script src='/resources/testharness.js'></script>
-  <script src='/resources/testharnessreport.js'></script>
-</head>
-<body>
-  <iframe id=frame></iframe>
-  <script>
-    async_test(t => {
-      let violations = [];
-      window.addEventListener("message", (e) => {
-        violations.push(e);
-        t.step_timeout(() => {
-          assert_equals(violations.length, 1);
-          t.done();
-        });
-      });
-
-      let forbidden_image = "<img src=https://127.0.0.1:1234/bla.jpg>";
-      let event_bouncer = "<script>document.addEventListener(" +
-          "'securitypolicyviolation'," +
-          "(e) => window.parent.postMessage(e.blockedURI, '*'));</sc" +
-          "ript>";
-      document.getElementById("frame").src =
-        "data:text/html;charset=utf-8," + event_bouncer + forbidden_image;
-    }, "Origin-Policy-based CSP violation should trigger 1 violation event");
-  </script>
-</body>
-</html>
diff --git a/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html.headers b/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html.headers
deleted file mode 100644
index 9456832d23c..00000000000
--- a/tests/wpt/web-platform-tests/origin-policy/origin-policy-single-report.https.tentative.html.headers
+++ /dev/null
@@ -1 +0,0 @@
-Sec-Origin-Policy: policy=policy-noimg
diff --git a/tests/wpt/web-platform-tests/portals/portals-focus.sub.html b/tests/wpt/web-platform-tests/portals/portals-focus.sub.html
index a05786186e5..1427dae2e4d 100644
--- a/tests/wpt/web-platform-tests/portals/portals-focus.sub.html
+++ b/tests/wpt/web-platform-tests/portals/portals-focus.sub.html
@@ -1,6 +1,8 @@
 <!DOCTYPE html>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
 <script src="resources/open-blank-host.js"></script>
 <body>
 <script>
@@ -14,59 +16,89 @@
 
   promise_test(async t => {
     let portal = await createPortal(document, new URL("resources/focus-page-with-button.html", location.href));
-    portal.onmessage = t.step_func(e => {
-      assert_unreached("button inside portal should not be focused");
-    });
-    portal.postMessage("focus", "*");
-    return new Promise(r => t.step_timeout(r, 500));
+    try {
+      portal.onmessage = t.step_func(e => {
+        assert_unreached("button inside portal should not be focused");
+      });
+      portal.postMessage("focus", "*");
+      await new Promise(r => t.step_timeout(r, 500));
+    } finally {
+      document.body.removeChild(portal);
+    }
   }, "test that an element inside a portal cannot steal focus");
 
   promise_test(async t => {
     let portal = await createPortal(document, new URL("resources/focus-page-with-x-origin-iframe.sub.html", location.href));
-    portal.onmessage = t.step_func(e => {
-      assert_unreached("button inside portal should not be focused");
-    });
-    portal.postMessage("focus", "*");
-    return new Promise(r => t.step_timeout(r, 500));
+    try {
+      portal.onmessage = t.step_func(e => {
+        assert_unreached("button inside portal should not be focused");
+      });
+      portal.postMessage("focus", "*");
+      await new Promise(r => t.step_timeout(r, 500));
+    } finally {
+      document.body.removeChild(portal);
+    }
   }, "test that an element inside a portal's x-origin subframe cannot steal focus");
 
   promise_test(async t => {
     let win = await openBlankPortalHost();
     let doc = win.document;
+    try {
+      let portal = await createPortal(doc, new URL("resources/simple-portal-adopts-predecessor.html", location.href));
+      let button = doc.createElement("button");
+      doc.body.appendChild(button);
 
-    let portal = await createPortal(doc, new URL("resources/simple-portal-adopts-predecessor.html", location.href));
-    let button = doc.createElement("button");
-    doc.body.appendChild(button);
+      await portal.activate();
+      doc.body.removeChild(portal);
 
-    await portal.activate();
-    doc.body.removeChild(portal);
-
-    button.onfocus = t.step_func(() => {
-      assert_unreached("button inside adopted portal should not be focused");
-    });
-    button.focus();
-    return new Promise(r => t.step_timeout(r, 500));
+      button.onfocus = t.step_func(() => {
+        assert_unreached("button inside adopted portal should not be focused");
+      });
+      button.focus();
+      await new Promise(r => t.step_timeout(r, 500));
+    } finally {
+      win.close();
+    }
   }, "test that an element inside an adopted portal cannot steal focus");
 
   promise_test(async t => {
     let win = await openBlankPortalHost();
     let doc = win.document;
+    try {
+      let portal = await createPortal(doc, new URL("resources/simple-portal-adopts-predecessor.html", location.href));
+      let iframe = doc.createElement("iframe");
+      iframe.src = new URL("resources/focus-page-with-button.html",
+                           "http://{{hosts[alt][www]}}:{{ports[http][0]}}/portals/");
+      doc.body.appendChild(iframe);
+      await new Promise(r => iframe.onload = r);
 
-    let portal = await createPortal(doc, new URL("resources/simple-portal-adopts-predecessor.html", location.href));
-    let iframe = doc.createElement("iframe");
-    iframe.src = new URL("resources/focus-page-with-button.html",
-                         "http://{{hosts[alt][www]}}:{{ports[http][0]}}/portals/");
-    doc.body.appendChild(iframe);
-    await new Promise(r => iframe.onload = r);
+      await portal.activate();
+      doc.body.removeChild(portal);
 
-    await portal.activate();
-    doc.body.removeChild(portal);
-
-    iframe.contentWindow.postMessage("focus", "*");
-    window.onmessage = t.step_func(() => {
-      assert_unreached("button inside x-origin iframe inside a portal should not be focused");
-    });
-    await new Promise(r => t.step_timeout(r, 500));
+      iframe.contentWindow.postMessage("focus", "*");
+      window.onmessage = t.step_func(() => {
+        assert_unreached("button inside x-origin iframe inside a portal should not be focused");
+      });
+      await new Promise(r => t.step_timeout(r, 500));
+    } finally {
+      win.close();
+    }
   }, "test that a x-origin iframe inside an adopted portal cannot steal focus");
+
+  const TAB = "\ue004"; // https://w3c.github.io/webdriver/#keyboard-actions
+  promise_test(async t => {
+    let portal = await createPortal(document, "resources/focus-page-with-button.html");
+    try {
+      portal.tabIndex = 0;
+      await test_driver.send_keys(document.body, TAB);
+      portal.onmessage = t.step_func(e => {
+        assert_unreached("button inside portal should not be focused");
+      });
+      await new Promise(r => t.step_timeout(r, 500));
+    } finally {
+      document.body.removeChild(portal);
+    }
+  }, "test that we cannot tab into a portal's contents");
+
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/portals/xfo/portals-xfo-deny.sub.html b/tests/wpt/web-platform-tests/portals/xfo/portals-xfo-deny.sub.html
new file mode 100644
index 00000000000..13c3f7f4d1f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/portals/xfo/portals-xfo-deny.sub.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+// TODO(jbroman): Ideally these would also check that the portal element gets a
+// completion event.
+
+async_test(t => {
+  var portal = document.createElement('portal');
+  portal.src = "/portals/xfo/resources/xfo-deny.asis";
+  portal.onmessage = t.unreached_func("should not have received a message");
+  document.body.appendChild(portal);
+  t.add_cleanup(() => portal.remove());
+  t.step_timeout(() => t.done(), 2000);
+}, "`XFO: DENY` blocks same-origin portals.");
+
+async_test(t => {
+  var portal = document.createElement('portal');
+  portal.src = "http://{{domains[www]}}:{{ports[http][0]}}/portals/xfo/resources/xfo-deny.asis";
+  portal.onmessage = t.unreached_func("should not have received a message");
+  document.body.appendChild(portal);
+  t.add_cleanup(() => portal.remove());
+  t.step_timeout(() => t.done(), 2000);
+}, "`XFO: DENY` blocks cross-origin portals.");
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/portals/xfo/resources/xfo-deny.asis b/tests/wpt/web-platform-tests/portals/xfo/resources/xfo-deny.asis
new file mode 100644
index 00000000000..429a40e559a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/portals/xfo/resources/xfo-deny.asis
@@ -0,0 +1,8 @@
+HTTP/1.1 200 OK
+Content-Type: text/html
+X-Frame-Options: DENY
+
+<!DOCTYPE html>
+<script>
+window.portalHost.postMessage('loaded');
+</script>
diff --git a/tests/wpt/web-platform-tests/referrer-policy/generic/inheritance/iframe-inheritance-data.html b/tests/wpt/web-platform-tests/referrer-policy/generic/inheritance/iframe-inheritance-data.html
index 0a45bb36c11..368e77e1217 100644
--- a/tests/wpt/web-platform-tests/referrer-policy/generic/inheritance/iframe-inheritance-data.html
+++ b/tests/wpt/web-platform-tests/referrer-policy/generic/inheritance/iframe-inheritance-data.html
@@ -24,7 +24,7 @@
             `data:text/html,<script src = "${BASE}/common/security-features/resources/common.sub.js"></` + `script>
             <script src = "${BASE}/referrer-policy/generic/referrer-policy-test-case.js"></` + `script>
             <script>
-              var urlPath = "/referrer-policy/generic/subresource/xhr.py";
+              var urlPath = "/common/security-features/subresource/xhr.py";
               var url = "${BASE}" + urlPath;
               requestViaXhr(url).then((msg) => {
                   parent.postMessage({referrer: msg.referrer}, "*")})
diff --git a/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js b/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js
new file mode 100644
index 00000000000..0147f50f371
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js
@@ -0,0 +1,222 @@
+'use strict';
+
+// Math helper - used mainly in hit test implementation done by webxr-test.js
+class XRMathHelper {
+  static toString(p) {
+    return "[" + p.x + "," + p.y + "," + p.z + "," + p.w + "]";
+  }
+
+  static transform_by_matrix(matrix, point) {
+    return {
+      x : matrix[0] * point.x + matrix[4] * point.y + matrix[8] * point.z + matrix[12] * point.w,
+      y : matrix[1] * point.x + matrix[5] * point.y + matrix[9] * point.z + matrix[13] * point.w,
+      z : matrix[2] * point.x + matrix[6] * point.y + matrix[10] * point.z + matrix[14] * point.w,
+      w : matrix[3] * point.x + matrix[7] * point.y + matrix[11] * point.z + matrix[15] * point.w,
+    };
+  }
+
+  static neg(p) {
+    return {x : -p.x, y : -p.y, z : -p.z, w : p.w};
+  }
+
+  static sub(lhs, rhs) {
+    // .w is treated here like an entity type, 1 signifies points, 0 signifies vectors.
+    // point - point, point - vector, vector - vector are ok, vector - point is not.
+    if (lhs.w != rhs.w && lhs.w == 0.0) {
+      console.warn("vector - point not allowed: " + toString(lhs) + "-" + toString(rhs));
+    }
+
+    return {x : lhs.x - rhs.x, y : lhs.y - rhs.y, z : lhs.z - rhs.z, w : lhs.w - rhs.w};
+  }
+
+  static add(lhs, rhs) {
+    if (lhs.w == rhs.w && lhs.w == 1.0) {
+      console.warn("point + point not allowed", p1, p2);
+    }
+
+    return {x : lhs.x + rhs.x, y : lhs.y + rhs.y, z : lhs.z + rhs.z, w : lhs.w + rhs.w};
+  }
+
+  static cross(lhs, rhs) {
+    if (lhs.w != 0.0 || rhs.w != 0.0) {
+      console.warn("cross product not allowed: " + toString(lhs) + "x" + toString(rhs));
+    }
+
+    return {
+      x : lhs.y * rhs.z - lhs.z * rhs.y,
+      y : lhs.z * rhs.x - lhs.x * rhs.z,
+      z : lhs.x * rhs.y - lhs.y * rhs.x,
+      w : 0
+    };
+  }
+
+  static dot(lhs, rhs) {
+    if (lhs.w != 0 || rhs.w != 0) {
+      console.warn("dot product not allowed: " + toString(lhs) + "x" + toString(rhs));
+    }
+
+    return lhs.x * rhs.x + lhs.y * rhs.y + lhs.z * rhs.z;
+  }
+
+  static mul(scalar, vector) {
+    if (vector.w != 0) {
+      console.warn("scalar * vector not allowed", scalar, vector);
+    }
+
+    return {x : vector.x * scalar, y : vector.y * scalar, z : vector.z * scalar, w : vector.w};
+  }
+
+  static length(vector) {
+    return Math.sqrt(XRMathHelper.dot(vector, vector));
+  }
+
+  static normalize(vector) {
+    const l = XRMathHelper.length(vector);
+    return XRMathHelper.mul(1.0/l, vector);
+  }
+
+  // All |face|'s points and |point| must be co-planar.
+  static pointInFace(point, face) {
+    const normalize = XRMathHelper.normalize;
+    const sub = XRMathHelper.sub;
+    const length = XRMathHelper.length;
+    const cross = XRMathHelper.cross;
+
+    let onTheRight = null;
+    let previous_point = face[face.length - 1];
+
+    // |point| is in |face| if it's on the same side of all the edges.
+    for (let i = 0; i < face.length; ++i) {
+      const current_point = face[i];
+
+      const edge_direction = normalize(sub(current_point, previous_point));
+      const turn_direction = normalize(sub(point, current_point));
+
+      const sin_turn_angle = length(cross(edge_direction, turn_direction));
+
+      if (onTheRight == null) {
+        onTheRight = sin_turn_angle >= 0;
+      } else {
+        if (onTheRight && sin_turn_angle < 0) return false;
+        if (!onTheRight && sin_turn_angle > 0) return false;
+      }
+
+      previous_point = current_point;
+    }
+
+    return true;
+  }
+
+  static det2x2(m00, m01, m10, m11) {
+    return m00 * m11 - m01 * m10;
+  }
+
+  static det3x3(
+    m00, m01, m02,
+    m10, m11, m12,
+    m20, m21, m22
+  ){
+    const det2x2 = XRMathHelper.det2x2;
+
+    return    m00 * det2x2(m11, m12, m21, m22)
+            - m01 * det2x2(m10, m12, m20, m22)
+            + m02 * det2x2(m10, m11, m20, m21);
+  }
+
+  static det4x4(
+    m00, m01, m02, m03,
+    m10, m11, m12, m13,
+    m20, m21, m22, m23,
+    m30, m31, m32, m33
+  ) {
+    const det3x3 = XRMathHelper.det3x3;
+
+    return  m00 * det3x3(m11, m12, m13,
+                         m21, m22, m23,
+                         m31, m32, m33)
+          - m01 * det3x3(m10, m12, m13,
+                         m20, m22, m23,
+                         m30, m32, m33)
+          + m02 * det3x3(m10, m11, m13,
+                         m20, m21, m23,
+                         m30, m31, m33)
+          - m03 * det3x3(m10, m11, m12,
+                         m20, m21, m22,
+                         m30, m31, m32);
+  }
+
+  static inv2(m) {
+    // mij - i-th column, j-th row
+    const m00 = m[0],  m01 = m[1],  m02 = m[2],  m03 = m[3];
+    const m10 = m[4],  m11 = m[5],  m12 = m[6],  m13 = m[7];
+    const m20 = m[8],  m21 = m[9],  m22 = m[10], m23 = m[11];
+    const m30 = m[12], m31 = m[13], m32 = m[14], m33 = m[15];
+
+    const det = det4x4(
+      m00, m01, m02, m03,
+      m10, m11, m12, m13,
+      m20, m21, m22, m23,
+      m30, m31, m32, m33
+    );
+  }
+
+  static transpose(m) {
+    const result = Array(16);
+    for (let i = 0; i < 4; i++) {
+      for (let j = 0; j < 4; j++) {
+        result[i * 4 + j] = m[j * 4 + i];
+      }
+    }
+    return result;
+  }
+
+  // Inverts the matrix, ported from transformation_matrix.cc.
+  static inverse(m) {
+    const det3x3 = XRMathHelper.det3x3;
+
+    // mij - i-th column, j-th row
+    const m00 = m[0],  m01 = m[1],  m02 = m[2],  m03 = m[3];
+    const m10 = m[4],  m11 = m[5],  m12 = m[6],  m13 = m[7];
+    const m20 = m[8],  m21 = m[9],  m22 = m[10], m23 = m[11];
+    const m30 = m[12], m31 = m[13], m32 = m[14], m33 = m[15];
+
+    const det = XRMathHelper.det4x4(
+      m00, m01, m02, m03,
+      m10, m11, m12, m13,
+      m20, m21, m22, m23,
+      m30, m31, m32, m33
+    );
+
+    if (Math.abs(det) < 0.0001) {
+      return null;
+    }
+
+    const invDet = 1.0 / det;
+    // Calculate `comatrix * 1/det`:
+    const result2 = [
+      // First column (m0r):
+      invDet * det3x3(m11, m12, m13, m21, m22, m23, m32, m32, m33),
+      invDet * det3x3(m10, m12, m13, m20, m22, m23, m30, m32, m33),
+      invDet * det3x3(m10, m11, m13, m20, m21, m23, m30, m31, m33),
+      invDet * det3x3(m10, m11, m12, m20, m21, m22, m30, m31, m32),
+      // Second column (m1r):
+      invDet * det3x3(m01, m02, m03, m21, m22, m23, m32, m32, m33),
+      invDet * det3x3(m00, m02, m03, m20, m22, m23, m30, m32, m33),
+      invDet * det3x3(m00, m01, m03, m20, m21, m23, m30, m31, m33),
+      invDet * det3x3(m00, m01, m02, m20, m21, m22, m30, m31, m32),
+      // Third column (m2r):
+      invDet * det3x3(m01, m02, m03, m11, m12, m13, m31, m32, m33),
+      invDet * det3x3(m00, m02, m03, m10, m12, m13, m30, m32, m33),
+      invDet * det3x3(m00, m01, m03, m10, m11, m13, m30, m31, m33),
+      invDet * det3x3(m00, m01, m02, m10, m11, m12, m30, m31, m32),
+      // Fourth column (m3r):
+      invDet * det3x3(m01, m02, m03, m11, m12, m13, m21, m22, m23),
+      invDet * det3x3(m00, m02, m03, m10, m12, m13, m20, m22, m23),
+      invDet * det3x3(m00, m01, m03, m10, m11, m13, m20, m21, m23),
+      invDet * det3x3(m00, m01, m02, m10, m11, m12, m20, m21, m22),
+    ];
+
+    // Actual inverse is `1/det * transposed(comatrix)`:
+    return XRMathHelper.transpose(result2);
+  }
+}
diff --git a/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js.headers b/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js.headers
new file mode 100644
index 00000000000..6805c323df5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/resources/chromium/webxr-test-math-helper.js.headers
@@ -0,0 +1 @@
+Content-Type: text/javascript; charset=utf-8
diff --git a/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js b/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
index ca627543aa4..16191695e89 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/webxr-test.js
@@ -231,6 +231,11 @@ class MockRuntime {
     this.input_sources_ = new Map();
     this.next_input_source_index_ = 1;
 
+    // Currently active hit test subscriptons.
+    this.hitTestSubscriptions_ = new Map();
+    // ID of the next subscription to be assigned.
+    this.next_hit_test_id_ = 1;
+
     let supportedModes = [];
     if (fakeDeviceInit.supportedModes) {
       supportedModes = fakeDeviceInit.supportedModes.slice();
@@ -591,8 +596,11 @@ class MockRuntime {
       bufferHolder: null,
       bufferSize: {},
     };
+
     this._injectAdditionalFrameData(options, frameData);
 
+    this._calculateHitTestResults(frameData);
+
     return Promise.resolve({
       frameData: frameData,
     });
@@ -620,6 +628,51 @@ class MockRuntime {
     // do not have any use for this data at present.
   }
 
+  // XREnvironmentIntegrationProvider implementation:
+  subscribeToHitTest(nativeOriginInformation, entityTypes, ray) {
+    if(!this.supportedModes_.includes(device.mojom.XRSessionMode.kImmersiveAr)) {
+      // Reject outside of AR.
+      return Promise.resolve({
+        result : device.mojom.SubscribeToHitTestResult.FAILED,
+        subscriptionId : 0
+      });
+    }
+
+    if(nativeOriginInformation.$tag == device.mojom.XRNativeOriginInformation.Tags.inputSourceId) {
+      if(!this.input_sources_.has(nativeOriginInformation.inputSourceId)) {
+        // Reject - unknown input source ID.
+        return Promise.resolve({
+          result : device.mojom.SubscribeToHitTestResult.FAILED,
+          subscriptionId : 0
+        });
+      }
+    } else if(nativeOriginInformation.$tag == device.mojom.XRNativeOriginInformation.Tags.referenceSpaceCategory) {
+      // Bounded_floor & unbounded ref spaces are not yet supported for AR:
+      if(nativeOriginInformation.referenceSpaceCategory == device.mojom.XRReferenceSpaceCategory.UNBOUNDED
+      || nativeOriginInformation.referenceSpaceCategory == device.mojom.XRReferenceSpaceCategory.BOUNDED_FLOOR) {
+        return Promise.resolve({
+          result : device.mojom.SubscribeToHitTestResult.FAILED,
+          subscriptionId : 0
+        });
+      }
+    } else {
+      // Planes and anchors are not yet supported by the mock interface.
+      return Promise.resolve({
+        result : device.mojom.SubscribeToHitTestResult.FAILED,
+        subscriptionId : 0
+      });
+    }
+
+    // Store the subscription information as-is:
+    const id = this.next_hit_test_id_++;
+    this.hitTestSubscriptions_.set(id, { nativeOriginInformation, entityTypes, ray });
+
+    return Promise.resolve({
+      result : device.mojom.SubscribeToHitTestResult.SUCCESS,
+      subscriptionId : id
+    });
+  }
+
   // Utility function
   requestRuntimeSession(sessionOptions) {
     return this.runtimeSupportsSession(sessionOptions).then((result) => {
@@ -680,6 +733,245 @@ class MockRuntime {
       supportsSession: this.supportedModes_.includes(options.mode)
     });
   }
+
+  // Private functions - hit test implementation:
+
+  // Modifies passed in frameData to add hit test results.
+  _calculateHitTestResults(frameData) {
+    if(!this.supportedModes_.includes(device.mojom.XRSessionMode.kImmersiveAr)) {
+      return;
+    }
+
+    frameData.hitTestSubscriptionResults = new device.mojom.XRHitTestSubscriptionResultsData();
+    frameData.hitTestSubscriptionResults.results = [];
+    frameData.hitTestSubscriptionResults.transientInputResults = [];
+
+    if(!this.world_) {
+      return;
+    }
+
+    // Non-transient hit test:
+    for(const [id, subscription] of this.hitTestSubscriptions_) {
+      const mojo_from_native_origin = this._getMojoFromNativeOrigin(subscription.nativeOriginInformation);
+      if(!mojo_from_native_origin) continue;
+
+      const ray_origin = {x: subscription.ray.origin.x, y: subscription.ray.origin.y, z: subscription.ray.origin.z, w: 1};
+      const ray_direction = {x: subscription.ray.direction.x, y: subscription.ray.direction.y, z: subscription.ray.direction.z, w: 0};
+
+      const mojo_ray_origin = XRMathHelper.transform_by_matrix(mojo_from_native_origin, ray_origin);
+      const mojo_ray_direction = XRMathHelper.transform_by_matrix(mojo_from_native_origin, ray_direction);
+
+      const results = this._hitTestWorld(mojo_ray_origin, mojo_ray_direction, subscription.entityTypes);
+
+      const result = new device.mojom.XRHitTestSubscriptionResultData();
+      result.subscriptionId = id;
+      result.hitTestResults = results;
+
+      frameData.hitTestSubscriptionResults.results.push(result);
+    }
+  }
+
+  // Hit tests the passed in ray (expressed as origin and direction) against the mocked world data.
+  _hitTestWorld(origin, direction, entityTypes) {
+    let result = [];
+
+    for(const region of this.world_.hitTestRegions) {
+      const partial_result = this._hitTestRegion(
+        region,
+        origin, direction,
+        entityTypes);
+
+      result = result.concat(partial_result);
+    }
+
+    return result.sort((lhs, rhs) => lhs.distance - rhs.distance);
+  };
+
+  // Hit tests the passed in ray (expressed as origin and direction) against world region.
+  // |entityTypes| is a set of FakeXRRegionTypes.
+  // |region| is FakeXRRegion.
+  // Returns array of XRHitResults, each entry will be decorated with the distance from the ray origin (along the ray).
+  _hitTestRegion(region, origin, direction, entityTypes) {
+    const regionNameToMojoEnum = {
+      "point":device.mojom.EntityTypeForHitTest.POINT,
+      "plane":device.mojom.EntityTypeForHitTest.PLANE,
+      "mesh":null
+    };
+
+    if(!entityTypes.includes(regionNameToMojoEnum[region.type])) {
+      return [];
+    }
+
+    const result = [];
+    for(const face of region.faces) {
+      const maybe_hit = this._hitTestFace(face, origin, direction);
+      if(maybe_hit) {
+        result.push(maybe_hit);
+      }
+    }
+
+    // The results should be sorted by distance and there should be no 2 entries with
+    // the same distance from ray origin - that would mean they are the same point.
+    // This situation is possible when a ray intersects the region through an edge shared
+    // by 2 faces.
+    return result.sort((lhs, rhs) => lhs.distance - rhs.distance)
+                 .filter((val, index, array) => index === 0 || val.distance !== array[index - 1].distance);
+  }
+
+  // Hit tests the passed in ray (expressed as origin and direction) against a single face.
+  // |face|, |origin|, and |direction| are specified in world (aka mojo) coordinates.
+  // |face| is an array of DOMPointInits.
+  // Returns null if the face does not intersect with the ray, otherwise the result is
+  // an XRHitResult with matrix describing the pose of the intersection point.
+  _hitTestFace(face, origin, direction) {
+    const add = XRMathHelper.add;
+    const sub = XRMathHelper.sub;
+    const mul = XRMathHelper.mul;
+    const normalize = XRMathHelper.normalize;
+    const dot = XRMathHelper.dot;
+    const cross = XRMathHelper.cross;
+    const neg = XRMathHelper.neg;
+
+    //1. Calculate plane normal in world coordinates.
+    const point_A = face[0];
+    const point_B = face[1];
+    const point_C = face[2];
+
+    const edge_AB = sub(point_B, point_A);
+    const edge_AC = sub(point_C, point_A);
+
+    const normal = normalize(cross(edge_AB, edge_AC));
+
+    const numerator = dot(sub(point_A, origin), normal);
+    const denominator = dot(direction, normal);
+
+    if(Math.abs(denominator) < 0.0001) {
+      // Planes are nearly parallel - there's either infinitely many intersection points or 0.
+      // Both cases signify a "no hit" for us.
+      return null;
+    } else {
+      // Single intersection point between the infinite plane and the line (*not* ray).
+      // Need to calculate the hit test matrix taking into account the face vertices.
+      const distance = numerator / denominator;
+      if(distance < 0) {
+        // Line - plane intersection exists, but not the half-line - plane does not.
+        return null;
+      } else {
+        const intersection_point = add(origin, mul(distance, direction));
+        // Since we are treating the face as a solid, flip the normal so that its
+        // half-space will contain the ray origin.
+        const y_axis = denominator > 0 ? neg(normal) : normal;
+
+        let z_axis = null;
+        const cos_direction_and_y_axis = dot(direction, y_axis);
+        if(Math.abs(cos_direction_and_y_axis) > 0.9999) {
+          // Ray and the hit test normal are co-linear - try using the 'up' or 'right' vector's projection on the face plane as the Z axis.
+          // Note: this edge case is currently not covered by the spec.
+          const up = {x: 0.0, y: 1.0, z: 0.0, w: 0.0};
+          const right = {x:1.0, y: 0.0, z: 0.0, w: 0.0};
+
+          z_axis = Math.abs(dot(up, y_axis)) > 0.9999
+                        ? sub(up, mul(dot(right, y_axis), y_axis))  // `up is also co-linear with hit test normal, use `right`
+                        : sub(up, mul(dot(up, y_axis), y_axis));    // `up` is not co-linear with hit test normal, use it
+        } else {
+          // Project the ray direction onto the plane, negate it and use as a Z axis.
+          z_axis = neg(sub(direction, mul(cos_direction_and_y_axis, y_axis))); // Z should point towards the ray origin, not away.
+        }
+
+        const x_axis = normalize(cross(y_axis, z_axis));
+
+        // Filter out the points not in polygon.
+        if(!XRMathHelper.pointInFace(intersection_point, face)) {
+          return null;
+        }
+
+        const hitResult = new device.mojom.XRHitResult();
+        hitResult.hitMatrix = new gfx.mojom.Transform();
+
+        hitResult.distance = distance;  // Extend the object with additional information used by higher layers.
+                                        // It will not be serialized over mojom.
+
+        hitResult.hitMatrix.matrix = new Array(16);
+
+        hitResult.hitMatrix.matrix[0] = x_axis.x;
+        hitResult.hitMatrix.matrix[1] = x_axis.y;
+        hitResult.hitMatrix.matrix[2] = x_axis.z;
+        hitResult.hitMatrix.matrix[3] = 0;
+
+        hitResult.hitMatrix.matrix[4] = y_axis.x;
+        hitResult.hitMatrix.matrix[5] = y_axis.y;
+        hitResult.hitMatrix.matrix[6] = y_axis.z;
+        hitResult.hitMatrix.matrix[7] = 0;
+
+        hitResult.hitMatrix.matrix[8] = z_axis.x;
+        hitResult.hitMatrix.matrix[9] = z_axis.y;
+        hitResult.hitMatrix.matrix[10] = z_axis.z;
+        hitResult.hitMatrix.matrix[11] = 0;
+
+        hitResult.hitMatrix.matrix[12] = intersection_point.x;
+        hitResult.hitMatrix.matrix[13] = intersection_point.y;
+        hitResult.hitMatrix.matrix[14] = intersection_point.z;
+        hitResult.hitMatrix.matrix[15] = 1;
+
+        return hitResult;
+      }
+    }
+  }
+
+  _getMojoFromNativeOrigin(nativeOriginInformation) {
+    const identity = function() {
+      return [
+        1, 0, 0, 0,
+        0, 1, 0, 0,
+        0, 0, 1, 0,
+        0, 0, 0, 1
+      ];
+    };
+
+    if(nativeOriginInformation.$tag == device.mojom.XRNativeOriginInformation.Tags.inputSourceId) {
+      if(!this.input_sources_.has(nativeOriginInformation.inputSourceId)) {
+        return null;
+      } else {
+        const inputSource = this.input_sources_.get(nativeOriginInformation.inputSourceId);
+        return inputSource.mojo_from_input_.matrix;
+      }
+    } else if(nativeOriginInformation.$tag == device.mojom.XRNativeOriginInformation.Tags.referenceSpaceCategory) {
+      switch(nativeOriginInformation.referenceSpaceCategory) {
+        case device.mojom.XRReferenceSpaceCategory.LOCAL:
+          return identity();
+        case device.mojom.XRReferenceSpaceCategory.LOCAL_FLOOR:
+          if(this.displayInfo_ == null || this.displayInfo_.stageParameters == null
+          || this.displayInfo_.stageParameters.standingTransform == null) {
+            console.warn("Standing transform not available.");
+            return null;
+          }
+          // this.displayInfo_.stageParameters.standingTransform = floor_from_mojo aka native_origin_from_mojo
+          return XRMathHelper.inverse(this.displayInfo_.stageParameters.standingTransform.matrix);
+        case device.mojom.XRReferenceSpaceCategory.VIEWER:
+          const transform = {
+            position: [
+              this.pose_.position.x,
+              this.pose_.position.y,
+              this.pose_.position.z],
+            orientation: [
+              this.pose_.orientation.x,
+              this.pose_.orientation.y,
+              this.pose_.orientation.z,
+              this.pose_.orientation.w],
+          };
+          return getMatrixFromTransform(transform);  // this.pose_ = mojo_from_viewer
+        case device.mojom.XRReferenceSpaceCategory.BOUNDED_FLOOR:
+          return null;
+        case device.mojom.XRReferenceSpaceCategory.UNBOUNDED:
+          return null;
+        default:
+          throw new TypeError("Unrecognized XRReferenceSpaceCategory!");
+      }
+    } else {
+      // Anchors & planes are not yet supported for hit test.
+      return null;
+    }
+  }
 }
 
 class MockXRSessionMetricsRecorder {
diff --git a/tests/wpt/web-platform-tests/resources/testharness.js b/tests/wpt/web-platform-tests/resources/testharness.js
index 2c3664dfa6a..9ff22b43072 100644
--- a/tests/wpt/web-platform-tests/resources/testharness.js
+++ b/tests/wpt/web-platform-tests/resources/testharness.js
@@ -1019,7 +1019,7 @@ policies and contribution forms [3].
 
         switch (typeof val) {
         case "string":
-            val = val.replace("\\", "\\\\");
+            val = val.replace(/\\/g, "\\\\");
             for (var p in replacements) {
                 var replace = "\\" + replacements[p];
                 val = val.replace(RegExp(String.fromCharCode(p), "g"), replace);
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction-ref.svg b/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction-ref.svg
new file mode 100644
index 00000000000..f07911627fe
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction-ref.svg
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <text x="100" y="100" font-size="50" style="direction: ltr; unicode-bidi: bidi-override">
+    <tspan style="opacity: 0.5">a</tspan>&#x5d2;<tspan style="opacity: 0.5">&#x5d1;</tspan>b
+  </text>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction.svg b/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction.svg
new file mode 100644
index 00000000000..fa153250e79
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/tspan-opacity-mixed-direction.svg
@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
+  <metadata>
+    <h:title>Opacity on tspan containing mixed direction text interleaving with other text</h:title>
+    <h:link rel="help" href="https://svgwg.org/svg2-draft/text.html"/>
+    <h:link rel="match" href="tspan-opacity-mixed-direction-ref.svg"/>
+  </metadata>
+  <text x="100" y="100" font-size="50">
+    <tspan style="opacity: 0.5">a&#x5d1;</tspan>&#x5d2;b
+  </text>
+</svg>
diff --git a/tests/wpt/web-platform-tests/tools/wpt/browser.py b/tests/wpt/web-platform-tests/tools/wpt/browser.py
index 6dd2f5c4c90..f0c2eeb94b8 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/browser.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/browser.py
@@ -1212,7 +1212,7 @@ class WebKitGTKMiniBrowser(WebKit):
         gcc = find_executable("gcc")
         if gcc:
             try:
-                triplet = call(gcc, "-dumpmachine").strip()
+                triplet = call(gcc, "-dumpmachine").decode().strip()
             except subprocess.CalledProcessError:
                 pass
         # Add Debian/Ubuntu path
@@ -1231,7 +1231,7 @@ class WebKitGTKMiniBrowser(WebKit):
         if binary is None:
             return None
         try:  # WebKitGTK MiniBrowser before 2.26.0 doesn't support --version
-            output = call(binary, "--version").strip()
+            output = call(binary, "--version").decode().strip()
         except subprocess.CalledProcessError:
             return None
         # Example output: "WebKitGTK 2.26.1"
diff --git a/tests/wpt/web-platform-tests/tools/wpt/run.py b/tests/wpt/web-platform-tests/tools/wpt/run.py
index 0c732e7ae8a..f6906fd0ac7 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/run.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/run.py
@@ -705,8 +705,9 @@ def setup_logging(kwargs, default_config=None, formatter_defaults=None):
 
 def setup_wptrunner(venv, prompt=True, install_browser=False, **kwargs):
     from wptrunner import wptcommandline
+    from six import iteritems
 
-    kwargs = utils.Kwargs(kwargs.iteritems())
+    kwargs = utils.Kwargs(iteritems(kwargs))
 
     product_parts = kwargs["product"].split(":")
     kwargs["product"] = product_parts[0].replace("-", "_")
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
index 74a358ed10b..328b43a0737 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
@@ -6,4 +6,4 @@ mozdebug==0.1.1
 pillow==6.2.1  # pyup: <7.0
 urllib3[secure]==1.25.7
 requests==2.22.0
-six==1.13.0
+six==1.14.0
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html b/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html
index 9f43dc93c5b..a417d66d9aa 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCDataChannel-close.html
@@ -12,15 +12,23 @@ promise_test(async t => {
   let pc1 = new RTCPeerConnection();
   t.add_cleanup(() => pc1.close());
   let [channel1, channel2] = await createDataChannelPair(pc1);
-  let close_handler = new Promise(resolve => {
+  let closeHandler = new Promise(resolve => {
     channel2.onclose = event => {
       resolve();
     };
   });
+  let closingSeen = false;
+  channel1.onclosing = t.unreached_func();
+  channel2.onclosing = event => {
+    assert_equals(channel2.readyState, 'closing');
+    closingSeen = true;
+  }
   channel2.addEventListener('error', t.unreached_func());
   channel1.close();
-  await close_handler;
-}, 'Close datachannel causes onclose to be called');
+  await closeHandler;
+  assert_equals(channel2.readyState, 'closed');
+  assert_true(closingSeen, 'Closing event was seen');
+}, 'Close datachannel causes onclosing and onclose to be called');
 
 promise_test(async t => {
   // This is the same test as above, but using addEventListener
@@ -28,15 +36,23 @@ promise_test(async t => {
   let pc1 = new RTCPeerConnection();
   t.add_cleanup(() => pc1.close());
   let [channel1, channel2] = await createDataChannelPair(pc1);
-  let close_handler = new Promise(resolve => {
+  let closeHandler = new Promise(resolve => {
     channel2.addEventListener('close', event => {
       resolve();
     });
   });
+  let closingSeen = false;
+  channel1.addEventListener('closing', t.unreached_func());
+  channel2.addEventListener('closing', event => {
+    assert_equals(channel2.readyState, 'closing');
+    closingSeen = true;
+  });
   channel2.addEventListener('error', t.unreached_func());
   channel1.close();
-  await close_handler;
-}, 'Close datachannel causes close event to be called');
+  await closeHandler;
+  assert_equals(channel2.readyState, 'closed');
+  assert_true(closingSeen, 'Closing event was seen');
+}, 'Close datachannel causes closing and close event to be called');
 
 promise_test(async t => {
   let pc1 = new RTCPeerConnection();
@@ -44,13 +60,13 @@ promise_test(async t => {
   let [channel1, channel2] = await createDataChannelPair(pc1);
   let events = [];
   let error = null;
-  let close_handler = new Promise(resolve => {
+  let closeHandler = new Promise(resolve => {
     channel2.addEventListener('close', event => {
       events.push('close');
       resolve();
     });
   });
-  let error_handler = new Promise((resolve, reject) => {
+  let errorHandler = new Promise((resolve, reject) => {
     channel2.addEventListener('error', event => {
       events.push('error');
       try {
@@ -64,8 +80,8 @@ promise_test(async t => {
     });
   });
   pc1.close();
-  await error_handler;
-  await close_handler;
+  await errorHandler;
+  await closeHandler;
   // Error should fire before close.
   assert_array_equals(['error', 'close'], events);
   assert_true(error instanceof RTCError);
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCRtpParameters-encodings.html b/tests/wpt/web-platform-tests/webrtc/RTCRtpParameters-encodings.html
index 0d3d08a1a2b..c9e14cb374b 100644
--- a/tests/wpt/web-platform-tests/webrtc/RTCRtpParameters-encodings.html
+++ b/tests/wpt/web-platform-tests/webrtc/RTCRtpParameters-encodings.html
@@ -45,11 +45,9 @@
       };
 
       dictionary RTCRtpEncodingParameters {
-        RTCDtxStatus        dtx;
         boolean             active;
         RTCPriorityType     priority;
         RTCPriorityType     networkPriority;
-        unsigned long       ptime;
         unsigned long       maxBitrate;
         double              maxFramerate;
 
@@ -59,11 +57,6 @@
         double              scaleResolutionDownBy;
       };
 
-      enum RTCDtxStatus {
-        "disabled",
-        "enabled"
-      };
-
       enum RTCPriorityType {
         "very-low",
         "low",
@@ -142,13 +135,11 @@
   promise_test(async t => {
     const pc = new RTCPeerConnection();
     t.add_cleanup(() => pc.close());
-    const { sender } = pc.addTransceiver('audio', {
+    const { sender } = pc.addTransceiver('video', {
       sendEncodings: [{
-        dtx: 'enabled',
         active: false,
         priority: 'low',
         networkPriority: 'low',
-        ptime: 5,
         maxBitrate: 8,
         maxFramerate: 25,
         rid: 'foo'
@@ -160,14 +151,12 @@
     validateSenderRtpParameters(param);
     const encoding = getFirstEncoding(param);
 
-    assert_equals(encoding.dtx, 'enabled');
     assert_equals(encoding.active, false);
     assert_equals(encoding.priority, 'low');
     assert_equals(encoding.networkPriority, 'low');
-    assert_equals(encoding.ptime, 5);
     assert_equals(encoding.maxBitrate, 8);
     assert_equals(encoding.maxFramerate, 25);
-    assert_equals(encoding.rid, 'foo');
+    assert_not_own_property(encoding, "rid", "rid should be removed with a single encoding");
 
   }, `sender.getParameters() should return sendEncodings set by addTransceiver()`);
 
@@ -260,7 +249,7 @@
   promise_test(async t => {
     const pc = new RTCPeerConnection();
     t.add_cleanup(() => pc.close());
-    const { sender } = pc.addTransceiver('audio');
+    const { sender } = pc.addTransceiver('video');
     await doOfferAnswerExchange(t, pc);
 
     const param = sender.getParameters();
@@ -330,12 +319,6 @@
     }, desc + ' without RTCRtpTransceiverInit');
   }
 
-  test_modified_encoding('audio', 'dtx', 'enabled', 'disabled',
-    'setParameters() with modified encoding.dtx should succeed');
-
-  test_modified_encoding('audio', 'dtx', 'enabled', undefined,
-    'setParameters() with unset encoding.dtx should succeed');
-
   test_modified_encoding('audio', 'active', false, true,
     'setParameters() with modified encoding.active should succeed');
 
@@ -345,13 +328,13 @@
   test_modified_encoding('audio', 'networkPriority', 'very-low', 'high',
     'setParameters() with modified encoding.networkPriority should succeed');
 
-  test_modified_encoding('audio', 'ptime', 2, 4,
-    'setParameters() with modified encoding.ptime should succeed');
-
   test_modified_encoding('audio', 'maxBitrate', 10000, 20000,
     'setParameters() with modified encoding.maxBitrate should succeed');
 
   test_modified_encoding('video', 'maxFramerate', 24, 16,
     'setParameters() with modified encoding.maxFramerate should succeed');
 
+  test_modified_encoding('video', 'scaleResolutionDownBy', 2, 4,
+    'setParameters() with modified encoding.scaleResolutionDownBy should succeed');
+
 </script>
diff --git a/tests/wpt/web-platform-tests/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html b/tests/wpt/web-platform-tests/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html
new file mode 100644
index 00000000000..3cbbd6ca3db
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webxr/hit-test/ar_hittest_subscription_refSpaces.https.html
@@ -0,0 +1,176 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/webxr_util.js"></script>
+<script src="../resources/webxr_test_asserts.js"></script>
+<script src="../resources/webxr_test_constants.js"></script>
+<script src="../resources/webxr_test_constants_fake_world.js"></script>
+<canvas />
+
+<script>
+
+// 1m above world origin.
+const VIEWER_ORIGIN_TRANSFORM = {
+  position: [0, 1, 0],
+  orientation: [0, 0, 0, 1],
+};
+
+// 0.25m above world origin.
+const FLOOR_ORIGIN_TRANSFORM = {
+  position: [0, -0.25, 0],
+  orientation: [0, 0, 0, 1],
+};
+
+const fakeDeviceInitParams = {
+  supportedModes: ["immersive-ar"],
+  views: VALID_VIEWS,
+  floorOrigin: FLOOR_ORIGIN_TRANSFORM,    // aka floor_from_mojo
+  viewerOrigin: VIEWER_ORIGIN_TRANSFORM,  // aka mojo_from_viewer
+  supportedFeatures: ALL_FEATURES,
+  world: createFakeWorld(5.0, 2.0, 5.0),  // webxr_test_constants_fake_world.js has detailed description of the fake world
+};
+
+// Generates a test function given the parameters for the hit test.
+// |ray| - ray that will be used to subscribe to hit test.
+// |entityTypes| - entity types that will be used for the hit test subscription.
+// |expectedPoses| - array of expected pose objects. The poses are expected to be expressed in local space.
+//                   Null entries in the array mean that the given entry will not be validated.
+// |refSpaceName| - XRReferenceSpaceType - either 'local', 'local-floor' or 'viewer'.
+let testFunctionGenerator = function(ray, entityTypes, expectedPoses, refSpaceName) {
+  const testFunction = function(session, fakeDeviceController, t) {
+    assert_equals(session.mode, 'immersive-ar');
+    assert_not_equals(session.environmentBlendMode, 'opaque');
+
+    return Promise.all([
+      session.requestReferenceSpace('local'),
+      session.requestReferenceSpace('viewer'),
+      session.requestReferenceSpace('local-floor'),
+    ]).then(([localRefSpace, viewerRefSpace, localFloorRefSpace]) => {
+
+      const refSpaceNameToSpace = {
+        'local' : localRefSpace,
+        'viewer' : viewerRefSpace,
+        'local-floor' : localFloorRefSpace
+      };
+
+      const hitTestOptionsInit = {
+        space: refSpaceNameToSpace[refSpaceName],
+        offsetRay: ray,
+        entityTypes: entityTypes,
+      };
+
+      return session.requestHitTestSource(hitTestOptionsInit).then(
+        (hitTestSource) => new Promise((resolve, reject) => {
+
+        const requestAnimationFrameCallback = function(time, frame) {
+          const hitTestResults = frame.getHitTestResults(hitTestSource);
+
+          t.step(() => {
+            assert_equals(hitTestResults.length, expectedPoses.length, "Results length should match expected results length");
+            for(const [index, expectedPose] of expectedPoses.entries()) {
+              const pose = hitTestResults[index].getPose(localRefSpace);
+              assert_true(pose != null, "Each hit test result should have a pose in viewer space");
+              if(expectedPose != null) {
+                assert_transform_approx_equals(pose.transform, expectedPose);
+              }
+            }
+          });
+
+          resolve();
+        };
+
+        t.step(() => {
+          assert_true(hitTestSource != null, "Hit test source should not be null");
+        });
+
+        session.requestAnimationFrame(requestAnimationFrameCallback);
+      }));
+    });
+  };
+
+  return testFunction;
+};
+
+// Generates a test function that will use local space for hit test subscription.
+// See testFunctionGenerator for explanation of other parameters.
+const localBasedTestFunctionGenerator = function(ray, entityTypes, expectedPoses) {
+  return testFunctionGenerator(ray, entityTypes, expectedPoses, 'local');
+};
+
+// Generates a test function that will use viewer space for hit test subscription.
+// See testFunctionGenerator for explanation of other parameters.
+const viewerBasedTestFunctionGenerator = function(ray, entityTypes, expectedPoses) {
+  return testFunctionGenerator(ray, entityTypes, expectedPoses, 'viewer');
+};
+
+// Generates a test function that will use local-floor space for hit test subscription.
+// See testFunctionGenerator for explanation of other parameters.
+const localFloorBasedTestFunctionGenerator = function(ray, entityTypes, expectedPoses) {
+  return testFunctionGenerator(ray, entityTypes, expectedPoses, 'local-floor');
+};
+
+// Pose of the first expected hit test result - straight ahead of the viewer, viewer-facing.
+const pose_1 = {
+  position: {x: 0.0, y: 1.0, z: -2.5, w: 1.0},
+  orientation: {x: 0.0, y: -0.707, z: -0.707, w: 0.0},
+    // Hit test API will set Y axis to the surface normal at the intersection point,
+    // Z axis towards the ray origin and X axis to cross product of Y axis & Z axis.
+    // If the surface normal and Z axis would be parallel, the hit test API
+    // will attempt to use `up` vector ([0, 1, 0]) as the Z axis, and if it so happens that Z axis
+    // and the surface normal would still be parallel, it will use the `right` vector ([1, 0, 0]) as the Z axis.
+    // In this particular case, `up` vector will work so the resulting pose.orientation
+    // becomes a rotation around [0, 1, 1] vector by 180 degrees.
+};
+
+xr_session_promise_test(
+  "Ensures subscription to hit test works with viewer space - straight ahead - plane",
+  viewerBasedTestFunctionGenerator(new XRRay(), ["plane"], [pose_1]),
+  fakeDeviceInitParams, 'immersive-ar', { 'requiredFeatures': ['local-floor'] });
+
+xr_session_promise_test("Ensures subscription to hit test works with viewer space - straight up - plane - no results",
+  viewerBasedTestFunctionGenerator(new XRRay({}, {x: 0.0, y: 1.0, z : 0.0}), ["plane"], []),
+  fakeDeviceInitParams, 'immersive-ar', { 'requiredFeatures': ['local-floor'] });
+
+const pose_2 = {
+  position: {x: 0.0, y: 2.0, z: 0.0, w: 1.0},
+  orientation: {x: 0.707, y: 0.0, z: 0.707, w: 0.0 },
+    // See comment for pose_1.orientation for details.
+    // In this case, the hit test pose will have Y axis facing downward ([0,-1,0]),
+    // Z axis to the right ([1,0,0]) and X axis towards world's Z axis ([0,0,1]).
+    // This is equivalent to the rotation around [1, 0, 1] vectir by 180 degrees.
+};
+
+xr_session_promise_test("Ensures subscription to hit test works with viewer space - straight up - point",
+  viewerBasedTestFunctionGenerator(new XRRay({}, {x: 0.0, y: 1.0, z : 0.0}), ["point"], [pose_2]),
+  fakeDeviceInitParams,
+  'immersive-ar', { 'requiredFeatures': ['local-floor'] });
+
+const pose_3 = {
+  position: {x: 0.0, y: 0.0, z: -2.5, w: 1.0},
+  orientation: {x: 0.0, y: -0.707, z: -0.707, w: 0.0},
+    // See comment for pose_1.orientation for details.
+    // In this case, the hit test pose will have Y and Z axis towards the ray origin so it won't be used,
+    // but `up` vector will work so the resulting pose.orientation
+    // becomes a rotation around [0, 1, 1] vector by 180 degrees.
+};
+
+xr_session_promise_test("Ensures subscription to hit test works with local space",
+  localBasedTestFunctionGenerator(new XRRay(), ["plane"], [pose_3]),
+  fakeDeviceInitParams,
+  'immersive-ar', { 'requiredFeatures': ['local-floor'] });
+
+const pose_4 = {
+  position: {x: 0.0, y: 0.25, z: -2.5, w: 1.0},
+  orientation: {x: 0.0, y: -0.707, z: -0.707, w: 0.0},
+    // See comment for pose_1.orientation for details.
+    // In this case, the hit test pose will have Y and Z axis towards the ray origin so it won't be used,
+    // but `up` vector will work so the resulting pose.orientation
+    // becomes a rotation around [0, 1, 1] vector by 180 degrees.
+};
+
+xr_session_promise_test("Ensures subscription to hit test works with local-floor space",
+  localFloorBasedTestFunctionGenerator(new XRRay(), ["plane"], [pose_4]),
+  fakeDeviceInitParams,
+  'immersive-ar', { 'requiredFeatures': ['local-floor'] });
+
+</script>
diff --git a/tests/wpt/web-platform-tests/webxr/resources/webxr_util.js b/tests/wpt/web-platform-tests/webxr/resources/webxr_util.js
index 85821d4d3d5..5f66dc9573d 100644
--- a/tests/wpt/web-platform-tests/webxr/resources/webxr_util.js
+++ b/tests/wpt/web-platform-tests/webxr/resources/webxr_util.js
@@ -145,6 +145,7 @@ let loadChromiumResources = Promise.resolve().then(() => {
     '/gen/ui/gfx/mojom/gpu_fence_handle.mojom.js',
     '/gen/ui/gfx/mojom/transform.mojom.js',
     '/gen/device/vr/public/mojom/vr_service.mojom.js',
+    '/resources/chromium/webxr-test-math-helper.js',
     '/resources/chromium/webxr-test.js',
     '/resources/testdriver.js',
     '/resources/testdriver-vendor.js',