Expose VideoCodingModule's decoder stats up the stack from VCMTiming to chrome://webrtc-internals.

R=juberti@google.com, mikhal@webrtc.org, stefan@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2429004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5027 4adac7df-926f-26a2-2b94-8c16560cd09d
13 files changed