The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/712923ad6b49badb8aa24c2a397677e8ecb97e95

commit 712923ad6b49badb8aa24c2a397677e8ecb97e95
Author: Yuly Novikov <ynovikov@chromium.org>
Date: Thu Oct 12 01:14:46 2017

Skip a couple of failing WebGL2 tests on Linux NVIDIA

tex_2d_luminance_alpha_luminance_alpha_unsigned_byte
tex_2d_luminance_luminance_unsigned_byte
in webgl2_conformance_gl_passthrough_tests

BUG= 773861 
TBR=kbr@chromium.org
NOTRY=true

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I2c12f98a5700bcd1bcfada32bbe05aca6ffad04a
Reviewed-on: https://chromium-review.googlesource.com/714379
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#508194}
[modify] https://crrev.com/712923ad6b49badb8aa24c2a397677e8ecb97e95/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available.

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Going to close this for now, will re-file more specific issues when we triage  WebGL failures.