Add support for transport wide sequence numbers

webrtc/config.h

 /*
  *  Copyright (c) 2013 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 42 matching lines @@
 struct RtpExtension {
   RtpExtension(const std::string& name, int id) : name(name), id(id) {}
   std::string ToString() const;
   static bool IsSupportedForAudio(const std::string& name);
   static bool IsSupportedForVideo(const std::string& name);
 
   static const char* kTOffset;
   static const char* kAbsSendTime;
   static const char* kVideoRotation;
   static const char* kAudioLevel;
+  static const char* kTransportSequenceNumber;
   std::string name;
   int id;
 };
 
 struct VideoStream {
   VideoStream();
   ~VideoStream();
   std::string ToString() const;
 
   size_t width;
@@ skipping 56 matching lines @@
 
 struct NetEqFastAccelerate {
   NetEqFastAccelerate() : enabled(false) {}
   explicit NetEqFastAccelerate(bool value) : enabled(value) {}
   bool enabled;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CONFIG_H_