Reland of "Make disabling 2d canvas GPU acceleration for getImageData less aggressive."

Reland of "Make disabling 2d canvas GPU acceleration for getImageData less aggressive."

Original patch https://codereview.chromium.org/2687073003/ reverted due to
test regression. The test failure does not happen now.

Make canvas switch out of gpu acceleration only when getImageData is
called in successive frames. This will avoid disabling gpu acceleration
when getImageData is only called once or is called very rarely.

BUG=690122
Review-Url: https://codereview.chromium.org/2788583002
Cr-Commit-Position: refs/heads/master@{#461232}
Committed: https://chromium.googlesource.com/chromium/src/+/9b1ac7f2a38585c066bc6523e0c08aeb1adbf171

[xiangze.zhang, 2017-03-30 07:48:36]

xiangze.zhang@intel.com changed reviewers:
+ junov@chromium.org

[xiangze.zhang, 2017-03-30 07:48:37]

Since the AMD Linux test failure issue is fixed now, I'd like to re-land this
patch. PTAL.

[Justin Novosad, 2017-03-30 18:00:42]

lgtm

[xiangze.zhang, 2017-03-31 05:14:32]

The CQ bit was checked by xiangze.zhang@intel.com to run a CQ dry run

[commit-bot: I haz the power, 2017-03-31 05:14:43]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[xiangze.zhang, 2017-03-31 05:55:47]

Description was changed from

==========
Reland of "Make disabling 2d canvas GPU acceleration for getImageData less
aggressive."

Original patch https://codereview.chromium.org/2687073003/ reverted due to
test regression. The regression issue is resolved now.

Make canvas switch out of gpu acceleration only when getImageData is
called in successive frames. This will avoid disabling gpu acceleration
when getImageData is only called once or is called very rarely.

BUG=690122
==========

to

==========
Reland of "Make disabling 2d canvas GPU acceleration for getImageData less
aggressive."

Original patch https://codereview.chromium.org/2687073003/ reverted due to
test regression. The test failure does not happen now.

Make canvas switch out of gpu acceleration only when getImageData is
called in successive frames. This will avoid disabling gpu acceleration
when getImageData is only called once or is called very rarely.

BUG=690122
==========

[commit-bot: I haz the power, 2017-03-31 06:40:23]

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

[commit-bot: I haz the power, 2017-03-31 06:40:24]

Dry run: This issue passed the CQ dry run.

[xiangze.zhang, 2017-03-31 08:19:23]

The workaround for the AMD driver bug does not work well and is reverted, but
this CL with the latest chromium code does not cause the previous test failure
anymore. So I'm going to land this if there's no other problems.

[Justin Novosad, 2017-03-31 21:04:05]

The CQ bit was checked by junov@chromium.org

[commit-bot: I haz the power, 2017-03-31 21:05:10]

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, 2017-03-31 21:14:29]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490994245060110, "parent_rev":
"2a6afb3179e8ef717bad49fa762f7f84c467f2e3", "commit_rev":
"9b1ac7f2a38585c066bc6523e0c08aeb1adbf171"}

[commit-bot: I haz the power, 2017-03-31 21:16:04]

Description was changed from

==========
Reland of "Make disabling 2d canvas GPU acceleration for getImageData less
aggressive."

Original patch https://codereview.chromium.org/2687073003/ reverted due to
test regression. The test failure does not happen now.

Make canvas switch out of gpu acceleration only when getImageData is
called in successive frames. This will avoid disabling gpu acceleration
when getImageData is only called once or is called very rarely.

BUG=690122
==========

to

==========
Reland of "Make disabling 2d canvas GPU acceleration for getImageData less
aggressive."

Original patch https://codereview.chromium.org/2687073003/ reverted due to
test regression. The test failure does not happen now.

Make canvas switch out of gpu acceleration only when getImageData is
called in successive frames. This will avoid disabling gpu acceleration
when getImageData is only called once or is called very rarely.

BUG=690122

Review-Url: https://codereview.chromium.org/2788583002
Cr-Commit-Position: refs/heads/master@{#461232}
Committed:
https://chromium.googlesource.com/chromium/src/+/9b1ac7f2a38585c066bc6523e0c0...
==========

[commit-bot: I haz the power, 2017-03-31 21:16:05]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/9b1ac7f2a38585c066bc6523e0c0...