- Remove MediaEngineInterface::GetAudioOptions(), SetAudioOptions() and SetSoundDevices(). - Remove the WebRtcVoiceEngine infrastructure for those calls. BUG=webrtc:4690 TBR=pthatcher@webrtc.org Review URL: https://codereview.webrtc.org/1500633002 Cr-Commit-Position: refs/heads/master@{#10938}