The functionality is moved into AudioState. Bug: webrtc:4690 Change-Id: Iee1bfd185566c9507422e8eea8a2cce02baaefe1 Reviewed-on: https://webrtc-review.googlesource.com/33521 Reviewed-by: Henrik Andreassson <henrika@webrtc.org> Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21324}