* Opus handles stereo and mono on the same payload type, so we need a different mechanism to choose between them. * Assorted cleanups. BUG=webrtc:1710 TBR=turaj@webrtc.org Review URL: https://webrtc-codereview.appspot.com/1379004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@3937 4adac7df-926f-26a2-2b94-8c16560cd09d