Auto merge of #18890 - glennw:update-wr-clip-text-aa, r=jdm

Update WR (details below):

* Add support for clip masks on text runs.
* Fix atomic ordering of items with multiple shadows.
* Update to bincode + ipc-channel with optimizations.
* Fix some plane splitting precision errors.
* Improve the anti-aliasing quality significantly.
* Add internal ClipChain support.
* Fix diacritic glyphs on Linux.

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tests/unit/gfx/Cargo.toml

@@ -12,5 +12,5 @@ doctest = false
 [dependencies]
 cssparser = "0.22.0"
 gfx = {path = "../../../components/gfx"}
-ipc-channel = "0.8"
+ipc-channel = "0.9"
 style = {path = "../../../components/style"}

tests/unit/metrics/Cargo.toml

@@ -13,7 +13,7 @@ doctest = false
 euclid = "0.15"
 gfx = {path = "../../../components/gfx"}
 gfx_traits = {path = "../../../components/gfx_traits"}
-ipc-channel = "0.8"
+ipc-channel = "0.9"
 metrics = {path = "../../../components/metrics"}
 msg = {path = "../../../components/msg"}
 net_traits = {path = "../../../components/net_traits"}

tests/unit/net/Cargo.toml

@@ -16,7 +16,7 @@ flate2 = "0.2.0"
 hyper = "0.10"
 hyper-openssl = "0.2"
 hyper_serde = "0.7"
-ipc-channel = "0.8"
+ipc-channel = "0.9"
 msg = {path = "../../../components/msg"}
 net = {path = "../../../components/net"}
 net_traits = {path = "../../../components/net_traits"}

tests/unit/profile/Cargo.toml

@@ -10,6 +10,6 @@ path = "lib.rs"
 doctest = false
 
 [dependencies]
-ipc-channel = "0.8"
+ipc-channel = "0.9"
 profile = {path = "../../../components/profile"}
 profile_traits = {path = "../../../components/profile_traits"}

tests/wpt/metadata-css/compositing-1_dev/html/mix-blend-mode-intermediate-element-overflow-hidden-and-border-radius.htm.ini

@@ -0,0 +1,6 @@
+[mix-blend-mode-intermediate-element-overflow-hidden-and-border-radius.htm]
+  type: reftest
+  expected:
+    if os == "linux": FAIL
+  bug: https://github.com/servo/webrender/issues/1776
+

tests/wpt/metadata-css/css-transforms-1_dev/html/transform-3d-rotateY-stair-below-001.htm.ini

@@ -0,0 +1,5 @@
+[transform-3d-rotateY-stair-below-001.htm]
+  type: reftest
+  expected: FAIL
+  bug: https://github.com/servo/webrender/issues/1776
+