Roll WebGL 53f132d..ff05380

https://chromium.googlesource.com/external/khronosgroup/webgl.git/+log/53f132d..ff05380

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

Review-Url: https://codereview.chromium.org/2116493004
Cr-Commit-Position: refs/heads/master@{#403414}

DEPS

@@ -181,7 +181,7 @@ deps = {
     Var('chromium_git') + '/external/bidichecker/lib.git' + '@' + '97f2aa645b74c28c57eca56992235c79850fa9e0',
 
   'src/third_party/webgl/src':
-   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '53f132deb0974fd93c8d4620fe08ae00d8b112c3',
+   Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'ff053809d18fa0fe3206ff488aa0b2f86e046a20',
 
   'src/third_party/webdriver/pylib':
     Var('chromium_git') + '/external/selenium/py.git' + '@' + '5fd78261a75fe08d27ca4835fb6c5ce4b42275bd',

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -471,12 +471,6 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         'texturesize.html',
         ['mac', 'intel'], bug=483282)
 
-    self.Fail('deqp/functional/gles3/textureformat/sized_color_cube_*.html',
-        ['mac', 'intel'], bug=612205)
-
-    self.Fail('conformance2/reading/read-pixels-from-fbo-test.html',
-        ['mac', 'intel'], bug=483282)
-
     # Linux only.
     self.Fail('deqp/data/gles3/shaders/functions.html',
         ['linux'], bug=483282)