Reland: Allow autotest extension to access system.display

Reland: Allow autotest extension to access system.display

system.display is currently only allowed for a few cases. Grant
autotest extension to use the API for test purpose, too.

TEST=Autotest works
TEST=Change display setting.  Did not crash with null check.
BUG=719804
BUG=712705
Review-Url: https://codereview.chromium.org/2874823002
Cr-Commit-Position: refs/heads/master@{#470737}
Committed: https://chromium.googlesource.com/chromium/src/+/90e6006c41c0013b8f48c02263e3a44c32da0c9c

[victorhsieh0, 2017-05-10 17:35:46]

victorhsieh@google.com changed reviewers:
+ stevenjb@chromium.org, victorhsieh@google.com

[victorhsieh0, 2017-05-10 17:35:46]

PTAL

[stevenjb, 2017-05-10 18:45:02]

lgtm

[victorhsieh0, 2017-05-10 18:53:35]

The CQ bit was checked by victorhsieh@google.com

[commit-bot: I haz the power, 2017-05-10 18:54:58]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-10 20:35:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-05-10 20:35:11]

Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[victorhsieh0, 2017-05-10 20:56:02]

The CQ bit was checked by victorhsieh@google.com

[commit-bot: I haz the power, 2017-05-10 20:58:03]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-10 22:38:28]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494449762850410, "parent_rev":
"d275c0f9de5d73976846ebdf2d0dc07e3aaa50c8", "commit_rev":
"90e6006c41c0013b8f48c02263e3a44c32da0c9c"}

[commit-bot: I haz the power, 2017-05-10 22:38:36]

Description was changed from

==========
Reland: Allow autotest extension to access system.display

system.display is currently only allowed for a few cases. Grant
autotest extension to use the API for test purpose, too.

TEST=Autotest works
TEST=Change display setting.  Did not crash with null check.
BUG=719804
BUG=712705
==========

to

==========
Reland: Allow autotest extension to access system.display

system.display is currently only allowed for a few cases. Grant
autotest extension to use the API for test purpose, too.

TEST=Autotest works
TEST=Change display setting.  Did not crash with null check.
BUG=719804
BUG=712705

Review-Url: https://codereview.chromium.org/2874823002
Cr-Commit-Position: refs/heads/master@{#470737}
Committed:
https://chromium.googlesource.com/chromium/src/+/90e6006c41c0013b8f48c02263e3...
==========

[commit-bot: I haz the power, 2017-05-10 22:38:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/90e6006c41c0013b8f48c02263e3...