Fix TSAN-detected data race: Sync with audio thread before accessing output_streams_ in unit test c…

Fix TSAN-detected data race: Sync with audio thread before accessing output_streams_ in unit test code.  Removed suppression.

BUG=170245
TEST=Ran TSAN analyzer tool before and after fix.  Confirmed several runs all succeed.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=177133

[miu, 2013-01-16 04:09:14]

Hey Tommi,

A quick fix for a TSAN failure.  TBR'ed to get the unit test up-and-running
again.  PTAL.

Thanks,
Yuri

[commit-bot: I haz the power, 2013-01-16 04:10:05]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[miu, 2013-01-16 04:12:20]

lgtm

[miu, 2013-01-16 04:18:16]

Meh.  Well, I'm supposed to be a full committer.  I guess this can wait. 
Un-TBR'ing Tommi.

[tommi (sloooow) - chröme, 2013-01-16 08:39:07]

lgtm

[commit-bot: I haz the power, 2013-01-16 08:39:39]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/miu@chromium.org/11962008/1

[Alexander Potapenko, 2013-01-16 08:54:39]

On 2013/01/16 04:18:16, Yuri wrote:
> Meh.  Well, I'm supposed to be a full committer.  I guess this can wait. 
> Un-TBR'ing Tommi.

Note you can't LGTM your own CLs :)

[commit-bot: I haz the power, 2013-01-16 11:40:37]

Change committed as 177133