Remove the atomic operations from media::AudioFifo, making it truly thread-unsafe.

Remove the atomic operations from media::AudioFifo, making it truly thread-unsafe.
This class isn't used in multithreaded fashion anymore.

BUG=NONE

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=277796

[henrika (OOO until Aug 14), 2014-06-17 10:51:08]

LGTM. Thanks for fixing.

[Alexander Potapenko, 2014-06-17 11:05:29]

The CQ bit was checked by glider@chromium.org

[commit-bot: I haz the power, 2014-06-17 11:06:02]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/glider@chromium.org/337163004/1

[Alexander Potapenko, 2014-06-17 11:21:47]

On 2014/06/17 11:06:02, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-status.appspot.com/cq/glider@chromium.org/337163004/1

Looks like I need an LGTM from one of the owners.

[Alexander Potapenko, 2014-06-17 11:21:49]

The CQ bit was unchecked by glider@chromium.org

[scherkus (not reviewing), 2014-06-17 16:19:50]

lgtm

[Alexander Potapenko, 2014-06-17 16:31:42]

The CQ bit was checked by glider@chromium.org

[commit-bot: I haz the power, 2014-06-17 16:33:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/glider@chromium.org/337163004/1

[commit-bot: I haz the power, 2014-06-17 17:39:22]

Change committed as 277796