henrika 3355f6d6f5 Avoids invalid copy of audio buffer to task queue.
Now does level estimate on the audio threads to avoid complex
copying of audio data to task queue. The old implementation could
also crash due to unclear ownership of the audio buffer.

BUG=webrtc:6569
R=kwiberg@webrtc.org

Review URL: https://codereview.webrtc.org/2433393002 .

Cr-Commit-Position: refs/heads/master@{#14720}
2016-10-21 10:45:31 +00:00
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