Roll WebGL 2e13422..afd388c

https://chromium.googlesource.com/external/khronosgroup/webgl.git/+log/2e13422..afd388c

BUG=
TEST=bots
NOTRY=true
TBR=kbr@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2319903004
Cr-Commit-Position: refs/heads/master@{#417584}

DEPS

@@ -183,7 +183,7 @@ deps = {
     Var('chromium_git') + '/external/bidichecker/lib.git' + '@' + '97f2aa645b74c28c57eca56992235c79850fa9e0',
 
   'src/third_party/webgl/src':
-   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '2e13422646f5a621968c30bffb9536b48ddd0d12',
+   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'afd388c7ac27e5408ae10b80eec9c5d849234430',
 
   'src/third_party/webdriver/pylib':
     Var('chromium_git') + '/external/selenium/py.git' + '@' + '5fd78261a75fe08d27ca4835fb6c5ce4b42275bd',

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -44,6 +44,7 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         bug=664740)
     self.Flaky('conformance2/query/occlusion-query.html', bug=603168)
     self.Fail('conformance2/misc/expando-loss-2.html', bug=483282)
+    self.Fail('conformance2/rendering/blitframebuffer-test.html', bug=634525)
 
     # Windows only.
     self.Fail('conformance2/textures/misc/copy-texture-image-luma-format.html',
@@ -334,26 +335,22 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
 
     # Mac AMD
     self.Fail('conformance/glsl/bugs/bool-type-cast-bug-int-float.html',
-        ['mac', 'amd'], bug=483282)
+        ['mac', 'amd'], bug=643866)
     self.Fail('conformance2/glsl3/bool-type-cast-bug-uint-ivec-uvec.html',
-        ['mac', 'amd'], bug=483282)
+        ['mac', 'amd'], bug=643866)
+    self.Fail('deqp/functional/gles3/shadercommonfunction.html',
+        ['mac', 'amd'], bug=643866)
+
     self.Fail('deqp/functional/gles3/multisample.html',
         ['mac', 'amd'], bug=617290)
-    self.Fail('deqp/functional/gles3/instancedrendering.html',
-        ['mac', 'amd'], bug=483282)
     self.Fail('deqp/functional/gles3/pixelbufferobject.html',
         ['mac', 'amd'], bug=483282)
     self.Fail('deqp/functional/gles3/primitiverestart/00.html',
         ['mac', 'amd'], bug=598930)
     self.Fail('deqp/functional/gles3/primitiverestart/01.html',
         ['mac', 'amd'], bug=598930)
-    self.Fail('deqp/functional/gles3/shadercommonfunction.html',
-        ['mac', 'amd'], bug=483282)
     self.Fail('deqp/functional/gles3/transformfeedback/*.html',
         ['mac', 'amd'], bug=483282)
-    self.Fail('deqp/functional/gles3/shadertexturefunction/' +
-        'texturesize.html',
-        ['mac', ('amd', 0x679e)], bug=640506)
     self.Fail('deqp/functional/gles3/shadertexturefunction/' +
         'textureprojlodoffset.html',
         ['mac', 'amd'], bug=483282)
@@ -386,6 +383,9 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     # Mac Pro with AMD GPU
     self.Flaky('deqp/functional/gles3/shaderindexing/mat_01.html',
         ['mac', ('amd', 0x679e)], bug=636648)
+    self.Fail('deqp/functional/gles3/shadertexturefunction/' +
+        'texturesize.html',
+        ['mac', ('amd', 0x679e)], bug=640506)
 
     # Mac Intel
     self.Fail('deqp/functional/gles3/texturefiltering/2d_combinations_01.html',