Improve speed of 2D canvas hibernation unit tests

Improve speed of 2D canvas hibernation unit tests

The canvas hibernation mechanism uses idle task scheduling, which
is desirable in the real world to prevent it from causing jank,
but introduces unnecessary delays in unit tests. This change
modifies Canvas2DLayerBridge to allow unit tests to request
undelayed scheduling in order to execute tests faster about 100x
faster than before.

BUG=650344
Committed: https://crrev.com/9358c2bb26d2e91cf648d560f705038f10a4994a
Cr-Commit-Position: refs/heads/master@{#421579}

[Justin Novosad, 2016-09-26 20:07:49]

The CQ bit was checked by junov@chromium.org to run a CQ dry run

[Justin Novosad, 2016-09-26 20:08:30]

junov@chromium.org changed reviewers:
+ xidachen@chromium.org, xlai@chromium.org

[Justin Novosad, 2016-09-26 20:08:31]

PTAL

[commit-bot: I haz the power, 2016-09-26 20:08:53]

Dry run: 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, 2016-09-26 21:49:53]

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

[commit-bot: I haz the power, 2016-09-26 21:49:55]

Dry run: This issue passed the CQ dry run.

[xlai (Olivia), 2016-09-26 21:56:54]

lgtm

[xidachen, 2016-09-27 00:37:02]

lgtm

[xidachen, 2016-09-28 16:50:38]

The CQ bit was checked by xidachen@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-28 16:50:59]

Dry run: 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, 2016-09-28 18:19:56]

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

[commit-bot: I haz the power, 2016-09-28 18:19:57]

Dry run: This issue passed the CQ dry run.

[xidachen, 2016-09-28 18:20:23]

The CQ bit was checked by xidachen@chromium.org

[commit-bot: I haz the power, 2016-09-28 18:20:57]

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, 2016-09-28 18:27:15]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-28 18:28:58]

Description was changed from

==========
Improve speed of 2D canvas hibernation unit tests

The canvas hibernation mechanism uses idle task scheduling, which
is desirable in the real world to prevent it from causing jank,
but introduces unnecessary delays in unit tests. This change
modifies Canvas2DLayerBridge to allow unit tests to request
undelayed scheduling in order to execute tests faster about 100x
faster than before.

BUG=650344
==========

to

==========
Improve speed of 2D canvas hibernation unit tests

The canvas hibernation mechanism uses idle task scheduling, which
is desirable in the real world to prevent it from causing jank,
but introduces unnecessary delays in unit tests. This change
modifies Canvas2DLayerBridge to allow unit tests to request
undelayed scheduling in order to execute tests faster about 100x
faster than before.

BUG=650344

Committed: https://crrev.com/9358c2bb26d2e91cf648d560f705038f10a4994a
Cr-Commit-Position: refs/heads/master@{#421579}
==========

[commit-bot: I haz the power, 2016-09-28 18:28:59]

Patchset 1 (id:??) landed as
https://crrev.com/9358c2bb26d2e91cf648d560f705038f10a4994a
Cr-Commit-Position: refs/heads/master@{#421579}