Increase OSX post-resume delay for new audio streams.

Increase OSX post-resume delay for new audio streams.

Still seem to be occasional reports of this happening, so increase
the post-resume delay to two seconds.

The UMA stat for OSX is still much higher than other platforms,
0.5% for OSX, but 0.01% for Windows.  I'll monitor the UMA values
to see if those values go down after landing this.

BUG=160920
TEST=none

Committed: https://crrev.com/50a8c9d4ccf77929d4a4e79b61318a3b46147137
Cr-Commit-Position: refs/heads/master@{#338970}

[DaleCurtis, 2015-07-16 00:50:59]

Patchset #1 (id:1) has been deleted

[DaleCurtis, 2015-07-16 00:51:37]

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

[xhwang, 2015-07-16 01:08:43]

lgtm

[DaleCurtis, 2015-07-16 01:13:16]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2015-07-16 01:13:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1230023009/20001

[commit-bot: I haz the power, 2015-07-16 01:18:07]

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

[commit-bot: I haz the power, 2015-07-16 01:18:08]

Try jobs failed on following builders:
  android_chromium_gn_compile_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)
  linux_chromium_gn_dbg on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

(exceeded global retry quota)

[DaleCurtis, 2015-07-16 01:39:43]

The CQ bit was checked by dalecurtis@chromium.org

[commit-bot: I haz the power, 2015-07-16 01:41:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1230023009/20001

[commit-bot: I haz the power, 2015-07-16 02:09:22]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-07-16 02:10:23]

Patchset 1 (id:??) landed as
https://crrev.com/50a8c9d4ccf77929d4a4e79b61318a3b46147137
Cr-Commit-Position: refs/heads/master@{#338970}