Roll WebGL 6e08f37..937acaa

https://chromium.googlesource.com/external/khronosgroup/webgl.git/+log/6e08f37..937acaa

BUG=
TEST=bots
TBR=kbr@chromium.org
NOTRY=true
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

Review-Url: https://codereview.chromium.org/2173913003
Cr-Commit-Position: refs/heads/master@{#407306}

DEPS

@@ -178,7 +178,7 @@ deps = {
     Var('chromium_git') + '/external/bidichecker/lib.git' + '@' + '97f2aa645b74c28c57eca56992235c79850fa9e0',
 
   'src/third_party/webgl/src':
-   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '6e08f374039cda35ba27c771b02cd10a50571f64',
+   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '937acaae1251a1e338bafe1995c0d54cb7142c60',
 
   'src/third_party/webdriver/pylib':
     Var('chromium_git') + '/external/selenium/py.git' + '@' + '5fd78261a75fe08d27ca4835fb6c5ce4b42275bd',

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -208,6 +208,10 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['mac'], bug=619264)
     self.Fail('deqp/functional/gles3/shaderloop_do_while.html',
         ['mac'], bug=617820)
+    self.Fail('deqp/functional/gles3/fbocompleteness.html',
+        ['mac'], bug=630800)
+    # self.Fail('deqp/functional/gles3/fbocompleteness.html',
+    #     ['mac', ('nvidia', 0xfe9)], bug=616562)
     self.Fail('deqp/data/gles3/shaders/linkage.html',
         ['mac'], bug=601821)
 
@@ -297,8 +301,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['mac', ('nvidia', 0xfe9)], bug=483282)
     self.Fail('deqp/functional/gles3/negativevertexarrayapi.html',
         ['mac', ('nvidia', 0xfe9)], bug=483282)
-    self.Fail('deqp/functional/gles3/fbocompleteness.html',
-        ['mac', ('nvidia', 0xfe9)], bug=616562)
 
     self.Fail('deqp/functional/gles3/texturespecification/' +
         'basic_copyteximage2d.html',