fix defect http://code.google.com/p/webrtc/issues/detail?id=215, audio device is not stopped appropriately. Review URL: http://webrtc-codereview.appspot.com/350008
fix defect http://code.google.com/p/webrtc/issues/detail?id=215, audio device is not stopped appropriately.
Review URL: http://webrtc-codereview.appspot.com/350008

git-svn-id: 9b397c5dfe384c04b1b200d5305b653241000171@1427 4adac7df-926f-26a2-2b94-8c16560cd09d

lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override,lukeweber/webrtc-src-override