Reduce usage of tmmbr information structure

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 113 matching lines @@
   // RTCP report blocks map mapped by source SSRC.
   using ReportBlockMap = std::map<uint32_t, ReportBlockInfoMap>;
 
   bool ParseCompoundPacket(const uint8_t* packet_begin,
                            const uint8_t* packet_end,
                            PacketInformation* packet_information);
 
   void TriggerCallbacksFromRtcpPacket(
       const PacketInformation& packet_information);
 
-  void CreateTmmbrInformation(uint32_t remote_ssrc)
+  TmmbrInformation* CreateTmmbrInformation(uint32_t remote_ssrc)
+      EXCLUSIVE_LOCKS_REQUIRED(rtcp_receiver_lock_);
+  // Update TmmbrInformation (if present) is alive.
+  void UpdateTmmbrRemoteIsAlive(uint32_t remote_ssrc)
       EXCLUSIVE_LOCKS_REQUIRED(rtcp_receiver_lock_);
   TmmbrInformation* GetTmmbrInformation(uint32_t remote_ssrc)
       EXCLUSIVE_LOCKS_REQUIRED(rtcp_receiver_lock_);
 
   void HandleSenderReport(const rtcp::CommonHeader& rtcp_block,
                           PacketInformation* packet_information)
       EXCLUSIVE_LOCKS_REQUIRED(rtcp_receiver_lock_);
 
   void HandleReceiverReport(const rtcp::CommonHeader& rtcp_block,
                             PacketInformation* packet_information)
@@ skipping 116 matching lines @@
   RtcpPacketTypeCounterObserver* const packet_type_counter_observer_;
   RtcpPacketTypeCounter packet_type_counter_;
 
   RtcpNackStats nack_stats_;
 
   size_t num_skipped_packets_;
   int64_t last_skipped_packets_warning_ms_;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_RECEIVER_H_