DevTools: do not add paint profiler tab more than once on Layers panel

DevTools: do not add paint profiler tab more than once on Layers panel

BUG=668981
Committed: https://crrev.com/cd57252aa5062cddbd5dba9c220482abfccf5995
Cr-Commit-Position: refs/heads/master@{#438404}

[caseq, 2016-12-14 00:21:33]

Patchset #1 (id:1) has been deleted

[caseq, 2016-12-14 00:21:55]

caseq@chromium.org changed reviewers:
+ alph@chromium.org

[alph, 2016-12-14 00:37:50]

The CQ bit was checked by alph@chromium.org

[alph, 2016-12-14 00:37:50]

lgtm

[commit-bot: I haz the power, 2016-12-14 00:38:34]

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, 2016-12-14 02:48:34]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1481675870226360,
"parent_rev": "c23bb5932f4a68fa7a7c887c1bcfe032ed3461ab", "commit_rev":
"1f0634a31aa0e5d9da0abc6fd0ba43e19360b1e5"}

[commit-bot: I haz the power, 2016-12-14 02:49:05]

Description was changed from

==========
DevTools: do not add paint profiler tab more than once on Layers panel

BUG=668981
==========

to

==========
DevTools: do not add paint profiler tab more than once on Layers panel

BUG=668981

Review-Url: https://codereview.chromium.org/2571983002
==========

[commit-bot: I haz the power, 2016-12-14 02:49:06]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2016-12-14 02:52:54]

Description was changed from

==========
DevTools: do not add paint profiler tab more than once on Layers panel

BUG=668981

Review-Url: https://codereview.chromium.org/2571983002
==========

to

==========
DevTools: do not add paint profiler tab more than once on Layers panel

BUG=668981

Committed: https://crrev.com/cd57252aa5062cddbd5dba9c220482abfccf5995
Cr-Commit-Position: refs/heads/master@{#438404}
==========

[commit-bot: I haz the power, 2016-12-14 02:52:55]

Patchset 1 (id:??) landed as
https://crrev.com/cd57252aa5062cddbd5dba9c220482abfccf5995
Cr-Commit-Position: refs/heads/master@{#438404}