BUG=webrtc:5876 Review-Url: https://codereview.webrtc.org/2745253007 Cr-Commit-Position: refs/heads/master@{#17267}
Calling APM and TransmitMixer directly instead. BUG=webrtc:4690 TBR=peah@webrtc.org Review-Url: https://codereview.webrtc.org/2681033010 Cr-Commit-Position: refs/heads/master@{#16734}