tree d8c3a29ef6afd19e320fa082a65dec8d56ba47d3
parent 161a586b457bf58402ac1e2d233988956e329ea8
author aleloi <aleloi@webrtc.org> 1476998604 -0700
committer Commit bot <commit-bot@chromium.org> 1476998610 +0000

Replaced thread checker with race checker in AudioMixer.

This change is due to an incorrect understanding of the threading
model in Chrome. The new AudioMixer has a thread checker to ensure
that mixing is always done from a single thread. Mixing is done on the
Audio Output Thread. When run in Chrome, it can change. Even if the thread
changes, there is never more than one audio thread, and mixing is done
sequentially.

The threading checks and variable access checks are replaced with
rtc::RaceChecker counterparts.

NOTRY=True
BUG=webrtc:6346

Review-Url: https://codereview.webrtc.org/2437913003
Cr-Commit-Position: refs/heads/master@{#14712}