Fixes race between RegisterSendPayload and SendOutgoingData. BUG= R=stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/4099006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5152 4adac7df-926f-26a2-2b94-8c16560cd09d
Fixes race between RegisterSendPayload and SendOutgoingData. BUG= R=stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/4099006 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5152 4adac7df-926f-26a2-2b94-8c16560cd09d