Revert "Remove -w flag now that WebRender is always used"

This reverts commit b94b58f7ae.
The wptrunner changes are not quite right and causes Python exceptions
inside the test haness.

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/canvas/to-data-url-test.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/constants-and-properties.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-attribute-preserve-drawing-buffer.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-creation-and-destruction.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-creation.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-hidden-alpha.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-lost-restored.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-release-upon-reload.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-release-with-workers.html.ini

@@ -3,3 +3,4 @@
   expected:
     if os == "linux": TIMEOUT
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/context/context-type-test.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/extensions/angle-instanced-arrays-out-of-bounds.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH

tests/wpt/metadata/webgl/conformance-1.0.3/conformance/extensions/angle-instanced-arrays.html.ini

@@ -2,3 +2,4 @@
   type: testharness
   expected:
     if os == "mac": CRASH
+    if not debug and (os == "mac") and (version == "OS X 10.10.5") and (processor == "x86_64") and (bits == 64) and (backend == "cpu"): CRASH