Add ThreadChecker for V8SamplingProfiler.

Add ThreadChecker for V8SamplingProfiler.

V8SamplingProfiler is now a subclass of AsyncEnabledStateObserver, this patch
adds a ThreadChecker in V8SamplingProfiler to ensure it gets called in the right
thread.

BUG=611027
Committed: https://crrev.com/a8aadea34d0be53e35e32ab882fb675e7307d8a7
Cr-Commit-Position: refs/heads/master@{#393698}

[lpy, 2016-05-13 20:54:05]

lpy@chromium.org changed reviewers:
+ alph@chromium.org, primiano@chromium.org

[lpy, 2016-05-13 20:54:05]

PTAL.

[alph, 2016-05-13 21:24:10]

The CQ bit was checked by alph@chromium.org

[alph, 2016-05-13 21:24:10]

lgtm

[commit-bot: I haz the power, 2016-05-13 21:24:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1975363002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1975363002/1

[commit-bot: I haz the power, 2016-05-13 22:05:34]

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

[commit-bot: I haz the power, 2016-05-13 22:05:35]

Try jobs failed on following builders:
  win8_chromium_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_ng/...)

[lpy, 2016-05-14 00:03:49]

The CQ bit was checked by lpy@chromium.org

[lpy, 2016-05-14 00:03:49]

The patchset sent to the CQ was uploaded after l-g-t-m from alph@chromium.org
Link to the patchset: https://codereview.chromium.org/1975363002/#ps20001
(title: " ")

[commit-bot: I haz the power, 2016-05-14 00:04:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1975363002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1975363002/20001

[commit-bot: I haz the power, 2016-05-14 00:10:51]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-14 00:12:47]

Description was changed from

==========
Add ThreadChecker for V8SamplingProfiler.

V8SamplingProfiler is now a subclass of AsyncEnabledStateObserver, this patch
adds a ThreadChecker in V8SamplingProfiler to ensure it gets called in the right
thread.

BUG=611027
==========

to

==========
Add ThreadChecker for V8SamplingProfiler.

V8SamplingProfiler is now a subclass of AsyncEnabledStateObserver, this patch
adds a ThreadChecker in V8SamplingProfiler to ensure it gets called in the right
thread.

BUG=611027

Committed: https://crrev.com/a8aadea34d0be53e35e32ab882fb675e7307d8a7
Cr-Commit-Position: refs/heads/master@{#393698}
==========

[commit-bot: I haz the power, 2016-05-14 00:12:48]

Patchset 2 (id:??) landed as
https://crrev.com/a8aadea34d0be53e35e32ab882fb675e7307d8a7
Cr-Commit-Position: refs/heads/master@{#393698}