aleloi e97974d203 Cleanup of the mixer interface.
This implements some of the suggestions in https://codereview.webrtc.org/2386383003/, namely

* Removing anonymous mixing.
* Removing the volume meter.

BUG=webrtc:6346

Review-Url: https://codereview.webrtc.org/2402283003
Cr-Commit-Position: refs/heads/master@{#14609}
2016-10-12 10:06:34 +00:00
..
2016-10-04 15:43:15 +00:00
2016-10-11 07:29:34 +00:00