Cleanup traces in WebRTC

Remove some unused traces and add a trace counter for encoded video size.

R=holmer@google.com, mflodman@webrtc.org, stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1476004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4050 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed