The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/77e2f680df22ab829b190f7c47576b937c5eea54

commit 77e2f680df22ab829b190f7c47576b937c5eea54
Author: Derek Beckett <dbeckett@google.com>
Date: Fri Jan 18 04:20:47 2019

[Autotest] policy_ScreenBrightnessPercent

This test verifies the effect of the ScreenBrightness user policy on Chrome OS
client behavior.

The test sets it to True, False, None

BUG=chromium:918034
TEST=this

Change-Id: Ib5b43220803bfbf1ce378bbaf3ec748e46512617
Reviewed-on: https://chromium-review.googlesource.com/1391578
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Max Timkovich <timkovich@chromium.org>

[add] https://crrev.com/77e2f680df22ab829b190f7c47576b937c5eea54/client/site_tests/policy_ScreenBrightnessPercent/control.100
[add] https://crrev.com/77e2f680df22ab829b190f7c47576b937c5eea54/client/site_tests/policy_ScreenBrightnessPercent/control.50
[add] https://crrev.com/77e2f680df22ab829b190f7c47576b937c5eea54/client/site_tests/policy_ScreenBrightnessPercent/control
[add] https://crrev.com/77e2f680df22ab829b190f7c47576b937c5eea54/client/site_tests/policy_ScreenBrightnessPercent/control.1
[add] https://crrev.com/77e2f680df22ab829b190f7c47576b937c5eea54/client/site_tests/policy_ScreenBrightnessPercent/policy_ScreenBrightnessPercent.py