Use VoiceChannel/VideoChannel directly from RtpSender/RtpReceiver.

webrtc/api/datachannel.cc

 /*
  *  Copyright 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.
  */
 
 #include "webrtc/api/datachannel.h"
 
 #include <memory>
 #include <string>
 
-#include "webrtc/api/mediastreamprovider.h"
 #include "webrtc/api/sctputils.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/refcount.h"
 #include "webrtc/media/sctp/sctpdataengine.h"
 
 namespace webrtc {
 
 static size_t kMaxQueuedReceivedDataBytes = 16 * 1024 * 1024;
 static size_t kMaxQueuedSendDataBytes = 16 * 1024 * 1024;
 
@@ skipping 604 matching lines @@
     QueueControlMessage(buffer);
   } else {
     LOG(LS_ERROR) << "Closing the DataChannel due to a failure to send"
                   << " the CONTROL message, send_result = " << send_result;
     Close();
   }
   return retval;
 }
 
 }  // namespace webrtc