Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/mediastreamtrack.h

 /*
  *  Copyright 2011 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.
  */
 
-#ifndef WEBRTC_API_MEDIASTREAMTRACK_H_
-#define WEBRTC_API_MEDIASTREAMTRACK_H_
+#ifndef WEBRTC_PC_MEDIASTREAMTRACK_H_
+#define WEBRTC_PC_MEDIASTREAMTRACK_H_
 
 #include <string>
 
 #include "webrtc/api/mediastreaminterface.h"
 #include "webrtc/api/notifier.h"
 
 namespace webrtc {
 
 // MediaTrack implements the interface common to AudioTrackInterface and
 // VideoTrackInterface.
@@ skipping 29 matching lines @@
   }
 
  private:
   bool enabled_;
   std::string id_;
   MediaStreamTrackInterface::TrackState state_;
 };
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_API_MEDIASTREAMTRACK_H_
+#endif  // WEBRTC_PC_MEDIASTREAMTRACK_H_