Enabling rtcp-rsize negotiation and fixing some issues with it.

webrtc/modules/rtp_rtcp/source/rtcp_receiver.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_receiver.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.h b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.h
index 1930670064514fa2e4a4469c4919dc7d6e9dd116..475ab1e26f70cf4db01cb35a5a50c6d0ee5a0e25 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.h
@@ -38,9 +38,6 @@ public:
               ModuleRtpRtcpImpl* owner);
     virtual ~RTCPReceiver();
 
-    RtcpMode Status() const;
-    void SetRTCPStatus(RtcpMode method);
-
     int64_t LastReceived();
     int64_t LastReceivedReceiverReport() const;
 
@@ -267,7 +264,6 @@ protected:
 
   Clock* const _clock;
   const bool receiver_only_;
-  RtcpMode _method;
   int64_t _lastReceived;
   ModuleRtpRtcpImpl& _rtpRtcp;