Add support for negotiating RTCP with reduced size.

talk/media/base/mediachannel.h

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 991 matching lines @@
 
 struct DataMediaInfo {
   void Clear() {
     senders.clear();
     receivers.clear();
   }
   std::vector<DataSenderInfo> senders;
   std::vector<DataReceiverInfo> receivers;
 };
 
+struct RtcpParameters {
+  bool reduced_size = false;
+};
+
 template <class Codec>
 struct RtpParameters {
   virtual std::string ToString() {
     std::ostringstream ost;
     ost << "{";
     ost << "codecs: " << VectorToString(codecs) << ", ";
     ost << "extensions: " << VectorToString(extensions);
     ost << "}";
     return ost.str();
   }
 
   std::vector<Codec> codecs;
   std::vector<RtpHeaderExtension> extensions;
   // TODO(pthatcher): Add streams.
+  RtcpParameters rtcp;
 };
 
 template <class Codec, class Options>
 struct RtpSendParameters : RtpParameters<Codec> {
   std::string ToString() override {
     std::ostringstream ost;
     ost << "{";
     ost << "codecs: " << VectorToString(this->codecs) << ", ";
     ost << "extensions: " << VectorToString(this->extensions) << ", ";
     ost << "max_bandiwidth_bps: " << max_bandwidth_bps << ", ";
@@ skipping 326 matching lines @@
   // Signal when the media channel is ready to send the stream. Arguments are:
   //     writable(bool)
   sigslot::signal1<bool> SignalReadyToSend;
   // Signal for notifying that the remote side has closed the DataChannel.
   sigslot::signal1<uint32> SignalStreamClosedRemotely;
 };
 
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_BASE_MEDIACHANNEL_H_