Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/pc/videotracksource.cc

 /*
  *  Copyright 2016 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/videotracksource.h"
+#include "webrtc/pc/videotracksource.h"
 
 #include <string>
 
 namespace webrtc {
 
 VideoTrackSource::VideoTrackSource(
     rtc::VideoSourceInterface<VideoFrame>* source,
     bool remote)
     : source_(source), state_(kInitializing), remote_(remote) {
   worker_thread_checker_.DetachFromThread();
@@ skipping 22 matching lines @@
 
 void VideoTrackSource::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   if (!source_) {
     return;
   }
   source_->RemoveSink(sink);
 }
 
 }  //  namespace webrtc