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

webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
index d65b04c8ab00405aeee884a646baa075375cabdb..da8c6871ab7945fb55283048344c922ddaf8f3d8 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
@@ -47,7 +47,6 @@ RTCPReceiver::RTCPReceiver(
     : TMMBRHelp(),
       _clock(clock),
       receiver_only_(receiver_only),
-      _method(RtcpMode::kOff),
       _lastReceived(0),
       _rtpRtcp(*owner),
       _criticalSectionFeedbacks(
@@ -103,16 +102,6 @@ RTCPReceiver::~RTCPReceiver() {
   }
 }
 
-RtcpMode RTCPReceiver::Status() const {
-  CriticalSectionScoped lock(_criticalSectionRTCPReceiver);
-  return _method;
-}
-
-void RTCPReceiver::SetRTCPStatus(RtcpMode method) {
-  CriticalSectionScoped lock(_criticalSectionRTCPReceiver);
-  _method = method;
-}
-
 int64_t RTCPReceiver::LastReceived() {
   CriticalSectionScoped lock(_criticalSectionRTCPReceiver);
   return _lastReceived;