Refactor registerable callbacks for FrameCountObserver from rtp_rtcp module into vie_channel.

R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16839004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6649 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h

@@ -373,10 +373,6 @@ class ModuleRtpRtcpImpl : public RtpRtcp {
 
   void OnRequestSendReport();
 
-  virtual void RegisterSendFrameCountObserver(
-      FrameCountObserver* observer) OVERRIDE;
-  virtual FrameCountObserver* GetSendFrameCountObserver() const OVERRIDE;
-
  protected:
   void RegisterChildModule(RtpRtcp* module);