RTCPeerConnection.addTrack and removeTrack added (behind flag)

third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 85 matching lines @@
       const WebString& label,
       const WebRTCDataChannelInit&) = 0;
   // Gets senders used by the peer connection. These are wrappers referencing
   // webrtc-layer senders, multiple |WebRTCRtpSender| objects referencing the
   // same webrtc-layer sender have the same |id|.
   virtual WebVector<std::unique_ptr<WebRTCRtpSender>> GetSenders() = 0;
   // Gets receivers used by the peer connection. These are wrappers referencing
   // webrtc-layer receivers, multiple |WebRTCRtpReceiver| objects referencing
   // the same webrtc-layer receiver have the same |id|.
   virtual WebVector<std::unique_ptr<WebRTCRtpReceiver>> GetReceivers() = 0;
+  // Adds the track to the peer connection, returning the resulting sender on
+  // success and null on failure.
+  virtual std::unique_ptr<WebRTCRtpSender> AddTrack(
+      const WebMediaStreamTrack&,
+      const WebVector<WebMediaStream>&) = 0;
+  // Removes the sender, returning whether successful. On success, the sender's
+  // track must have been set to null.
+  virtual bool RemoveTrack(WebRTCRtpSender*) = 0;
   virtual WebRTCDTMFSenderHandler* CreateDTMFSender(
       const WebMediaStreamTrack&) = 0;
   virtual void Stop() = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebRTCPeerConnectionHandler_h