This might be related to Issue 894440, which caused a related test, GpuProcess_disabling_workarounds_works, to begin failing. Unfortunately the bot was red when this test started failing. Here's the last known build before it started failing:

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Android%20FYI%20Release%20%28Nexus%209%29/9196

and the first build where it failed:

https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Android%20FYI%20Release%20%28Nexus%209%29/9198

It doesn't look like there are suspicious CLs in the blamelists.

It's safe to unrestrict access to this bug.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9ec21c366a7c27c830a0b0544a9a37618205c02e

commit 9ec21c366a7c27c830a0b0544a9a37618205c02e
Author: Eric Karl <ericrk@chromium.org>
Date: Tue Oct 16 20:31:27 2018

Disable failing GpuProcess_webgl_disabled_extension test

This is failing on the N9 FYI bot, see  issue 895945 .

TBR=kbr@chromium.org

Bug:  895945 
Change-Id: Ib735cbfcc04e334cc9204acf8ccc2792239323c5
Reviewed-on: https://chromium-review.googlesource.com/c/1283952
Reviewed-by: Eric Karl <ericrk@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600109}
[modify] https://crrev.com/9ec21c366a7c27c830a0b0544a9a37618205c02e/content/test/gpu/gpu_tests/gpu_process_expectations.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8241b8e3270f62b8018e273ac0e5fb0586c40324

commit 8241b8e3270f62b8018e273ac0e5fb0586c40324
Author: Zhenyao Mo <zmo@chromium.org>
Date: Mon Oct 22 22:50:57 2018

Change gpu driver bug list test_group semantics from replace to append

Because we don't want to disable necessary workarounds on bots, otherwise
Chrome run may fail.

BUG= 895020 , 895945 
TEST=gpu_unittests,gpu_integration_test:gpu_process
R=piman@chromium.org

Change-Id: I496e3cac9f16943d57cb10334648c1b54f976543
Reviewed-on: https://chromium-review.googlesource.com/c/1289699
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601758}
[modify] https://crrev.com/8241b8e3270f62b8018e273ac0e5fb0586c40324/content/test/gpu/gpu_tests/gpu_process_expectations.py
[modify] https://crrev.com/8241b8e3270f62b8018e273ac0e5fb0586c40324/content/test/gpu/gpu_tests/gpu_process_integration_test.py
[modify] https://crrev.com/8241b8e3270f62b8018e273ac0e5fb0586c40324/gpu/config/gpu_control_list.cc
[modify] https://crrev.com/8241b8e3270f62b8018e273ac0e5fb0586c40324/gpu/config/gpu_control_list_format.txt
[modify] https://crrev.com/8241b8e3270f62b8018e273ac0e5fb0586c40324/gpu/config/gpu_switches.cc