[cpu-profiler] Do not record empty stack trace.

[cpu-profiler] Do not record empty stack trace.

When it is in executing JS state there should be a JS stack.
Having no stack means something is wrong with frame pointer, so
just skip the bogus sample.

Committed: https://crrev.com/7e1d1fc708b9072ee460f24bf3ccf26c0b4a2a21
Cr-Commit-Position: refs/heads/master@{#37802}

[alph, 2016-07-14 22:57:10]

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

[commit-bot: I haz the power, 2016-07-14 22:57:13]

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

[alph, 2016-07-14 23:15:18]

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

[alph, 2016-07-14 23:15:19]

Yang, please take a look.

[commit-bot: I haz the power, 2016-07-14 23:25:41]

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

[commit-bot: I haz the power, 2016-07-14 23:25:42]

Dry run: This issue passed the CQ dry run.

[Yang, 2016-07-15 11:12:45]

lgtm

[alph, 2016-07-15 17:17:04]

The CQ bit was checked by alph@chromium.org

[commit-bot: I haz the power, 2016-07-15 17:17:09]

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, 2016-07-15 17:20:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-15 17:22:01]

Description was changed from

==========
[cpu-profiler] Do not record empty stack trace.

When it is in executing JS state there should be a JS stack.
Having no stack means something is wrong with frame pointer, so
just skip the bogus sample.
==========

to

==========
[cpu-profiler] Do not record empty stack trace.

When it is in executing JS state there should be a JS stack.
Having no stack means something is wrong with frame pointer, so
just skip the bogus sample.

Committed: https://crrev.com/7e1d1fc708b9072ee460f24bf3ccf26c0b4a2a21
Cr-Commit-Position: refs/heads/master@{#37802}
==========

[commit-bot: I haz the power, 2016-07-15 17:22:01]

Patchset 1 (id:??) landed as
https://crrev.com/7e1d1fc708b9072ee460f24bf3ccf26c0b4a2a21
Cr-Commit-Position: refs/heads/master@{#37802}