Fix and enable WinAudioInputTest.WASAPIAudioInputStreamTestPacketSizes.

Fix and enable WinAudioInputTest.WASAPIAudioInputStreamTestPacketSizes.

Contrary to what had been assumed, CheckCountAndPostQuitTask doesn't
run on the main thread. Because of that, it cannot quit the RunLoop
running on the main thread by calling its QuitWhenIdle function; it
needs to post a QuitWhenIdleClosure to it.

BUG=641142
Committed: https://crrev.com/7accaec8bb0f2bc5172e816370895b3e5cb1d874
Cr-Commit-Position: refs/heads/master@{#414783}

[fdoray, 2016-08-26 14:44:38]

fdoray@chromium.org changed reviewers:
+ kbr@chromium.org

[fdoray, 2016-08-26 14:44:38]

PTAL

[DaleCurtis, 2016-08-26 18:17:11]

dalecurtis@chromium.org changed reviewers:
+ dalecurtis@chromium.org

[DaleCurtis, 2016-08-26 18:17:12]

lgtm

[fdoray, 2016-08-26 18:18:32]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2016-08-26 18:19:41]

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, 2016-08-26 19:42:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-26 19:45:16]

Description was changed from

==========
Fix and enable WinAudioInputTest.WASAPIAudioInputStreamTestPacketSizes.

Contrary to what had been assumed, CheckCountAndPostQuitTask doesn't
run on the main thread. Because of that, it cannot quit the RunLoop
running on the main thread by calling its QuitWhenIdle function; it
needs to post a QuitWhenIdleClosure to it.

BUG=641142
==========

to

==========
Fix and enable WinAudioInputTest.WASAPIAudioInputStreamTestPacketSizes.

Contrary to what had been assumed, CheckCountAndPostQuitTask doesn't
run on the main thread. Because of that, it cannot quit the RunLoop
running on the main thread by calling its QuitWhenIdle function; it
needs to post a QuitWhenIdleClosure to it.

BUG=641142

Committed: https://crrev.com/7accaec8bb0f2bc5172e816370895b3e5cb1d874
Cr-Commit-Position: refs/heads/master@{#414783}
==========

[commit-bot: I haz the power, 2016-08-26 19:45:17]

Patchset 1 (id:??) landed as
https://crrev.com/7accaec8bb0f2bc5172e816370895b3e5cb1d874
Cr-Commit-Position: refs/heads/master@{#414783}