[cleanup] Remove unused fields/functions from rtcp module.

webrtc/modules/rtp_rtcp/source/rtcp_receiver.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 28 matching lines @@
     virtual ~RTCPReceiver();
 
     RtcpMode Status() const;
     void SetRTCPStatus(RtcpMode method);
 
     int64_t LastReceived();
     int64_t LastReceivedReceiverReport() const;
 
     void SetSsrcs(uint32_t main_ssrc,
                   const std::set<uint32_t>& registered_ssrcs);
-    void SetRelaySSRC(uint32_t ssrc);
     void SetRemoteSSRC(uint32_t ssrc);
     uint32_t RemoteSSRC() const;
 
-    uint32_t RelaySSRC() const;
-
     int32_t IncomingRTCPPacket(
         RTCPHelp::RTCPPacketInformation& rtcpPacketInformation,
         RTCPUtility::RTCPParserV2 *rtcpParser);
 
     void TriggerCallbacksFromRTCPPacket(
         RTCPHelp::RTCPPacketInformation& rtcpPacketInformation);
 
     // get received cname
     int32_t CNAME(uint32_t remoteSSRC, char cName[RTCP_CNAME_SIZE]) const;
 
@@ skipping 231 matching lines @@
   uint32_t _lastReceivedXRNTPfrac;
   // Estimated rtt, zero when there is no valid estimate.
   int64_t xr_rr_rtt_ms_;
 
   // Received report blocks.
   ReportBlockMap _receivedReportBlockMap
       GUARDED_BY(_criticalSectionRTCPReceiver);
   ReceivedInfoMap _receivedInfoMap;
   std::map<uint32_t, RTCPUtility::RTCPCnameInformation*> _receivedCnameMap;
 
-  uint32_t _packetTimeOutMS;
-
   // The last time we received an RTCP RR.
   int64_t _lastReceivedRrMs;
 
   // The time we last received an RTCP RR telling we have successfully
   // delivered RTP packet to the remote side.
   int64_t _lastIncreasedSequenceNumberMs;
 
   RtcpStatisticsCallback* stats_callback_ GUARDED_BY(_criticalSectionFeedbacks);
 
   RtcpPacketTypeCounterObserver* const packet_type_counter_observer_;
   RtcpPacketTypeCounter packet_type_counter_;
 
   RTCPUtility::NackStats nack_stats_;
 
   size_t num_skipped_packets_;
   int64_t last_skipped_packets_warning_;
 };
 }  // namespace webrtc
 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_RECEIVER_H_