Remove CriticalSectionWrapper from audio conference mixer.

Remove CriticalSectionWrapper from audio conference mixer.

BUG=webrtc:7035
Review-Url: https://codereview.webrtc.org/2772573006
Cr-Commit-Position: refs/heads/master@{#17381}
Committed: https://chromium.googlesource.com/external/webrtc/+/90947052d5f50ddd5a929275a41dda3635ea0504

[kthelgason, 2017-03-24 15:06:38]

The CQ bit was checked by kthelgason@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-24 15:06:47]

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

[commit-bot: I haz the power, 2017-03-24 15:35:00]

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

[commit-bot: I haz the power, 2017-03-24 15:35:01]

Dry run: This issue passed the CQ dry run.

[kthelgason, 2017-03-24 16:15:42]

kthelgason@webrtc.org changed reviewers:
+ tommi@webrtc.org

[kthelgason, 2017-03-24 16:15:42]

It's a dirty job but someone's gotta do it!

[tommi, 2017-03-26 17:27:29]

The CQ bit was checked by tommi@webrtc.org

[tommi, 2017-03-26 17:27:29]

lgtm

[commit-bot: I haz the power, 2017-03-26 17:27:36]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-03-26 17:50:48]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490549249023800, "parent_rev":
"81bf7b07256970f4410bc0ad0f44ccf0f7144b00", "commit_rev":
"90947052d5f50ddd5a929275a41dda3635ea0504"}

[commit-bot: I haz the power, 2017-03-26 17:50:51]

Description was changed from

==========
Remove CriticalSectionWrapper from audio conference mixer.

BUG=webrtc:7035
==========

to

==========
Remove CriticalSectionWrapper from audio conference mixer.

BUG=webrtc:7035

Review-Url: https://codereview.webrtc.org/2772573006
Cr-Commit-Position: refs/heads/master@{#17381}
Committed:
https://chromium.googlesource.com/external/webrtc/+/90947052d5f50ddd5a929275a...
==========

[commit-bot: I haz the power, 2017-03-26 17:50:52]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/90947052d5f50ddd5a929275a...