The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/958775d9e7e174394faf2656a7030b8f4ad347d9

commit 958775d9e7e174394faf2656a7030b8f4ad347d9
Author: Yunchao He <yunchao.he@intel.com>
Date: Mon May 28 16:13:48 2018

Suppress WebGL tests on multiple OSes

TBR=kbr@chromium.org, zmo@chromium.org

Bug:  844308 , 844311, 847217, 847222
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Ied61bc487c493596140c651a1c926378f3c144d9
Reviewed-on: https://chromium-review.googlesource.com/1075295
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#562275}
[modify] https://crrev.com/958775d9e7e174394faf2656a7030b8f4ad347d9/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
[modify] https://crrev.com/958775d9e7e174394faf2656a7030b8f4ad347d9/content/test/gpu/gpu_tests/webgl_conformance_expectations.py

Log excerpt:

  Traceback (most recent call last):
    _RunGpuTest at content/test/gpu/gpu_tests/gpu_integration_test.py:132
      self.RunActualGpuTest(url, *args)
    RunActualGpuTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:185
      getattr(self, test_name)(test_path, *args[1:])
    _RunConformanceTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:199
      self._CheckTestCompletion()
    _CheckTestCompletion at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:195
      self.fail(self._WebGLTestMessages(self.tab))
    fail at .swarming_module/lib/python2.7/unittest/case.py:410
      raise self.failureException(msg)
  AssertionError: Found 0 lines, looking in the horizontal direction, expected 2
  FAIL Found 0 lines, looking in the horizontal direction, expected 2
  Found 0 lines, looking in the vertical direction, expected 2
  FAIL Found 0 lines, looking in the vertical direction, expected 2

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e1f57590d794761f5cc08caba262b346b8e67091

commit e1f57590d794761f5cc08caba262b346b8e67091
Author: Yunchao He <yunchao.he@intel.com>
Date: Wed May 30 04:20:13 2018

Update one WebGL CTS expectation.

This is a follow-up change as kbr@ suggested at
https://chromium-review.googlesource.com/c/chromium/src/+/1075295.

Bug: 847222
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I5d7d02e6586a5ca9d82be7531fac6264054ce417
Reviewed-on: https://chromium-review.googlesource.com/1077810
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>
Cr-Commit-Position: refs/heads/master@{#562729}
[modify] https://crrev.com/e1f57590d794761f5cc08caba262b346b8e67091/content/test/gpu/gpu_tests/webgl_conformance_expectations.py