Revert of Delete empty API files and cleaned up includes.

webrtc/api/videocapturertracksource_unittest.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 <string>
 #include <vector>
 
+#include "webrtc/api/remotevideocapturer.h"
 #include "webrtc/api/test/fakeconstraints.h"
 #include "webrtc/api/videocapturertracksource.h"
 #include "webrtc/base/gunit.h"
 #include "webrtc/media/base/fakemediaengine.h"
 #include "webrtc/media/base/fakevideocapturer.h"
 #include "webrtc/media/base/fakevideorenderer.h"
 #include "webrtc/media/engine/webrtcvideoframe.h"
 
 using webrtc::FakeConstraints;
 using webrtc::VideoCapturerTrackSource;
@@ skipping 457 matching lines @@
   FakeConstraints constraints;
   constraints.AddOptional(MediaConstraintsInterface::kMaxFrameRate, 0.5);
 
   CreateVideoCapturerSource(&constraints);
   EXPECT_EQ_WAIT(MediaSourceInterface::kLive, state_observer_->state(),
                  kMaxWaitMs);
   const cricket::VideoFormat* format = capturer_->GetCaptureFormat();
   ASSERT_TRUE(format != NULL);
   EXPECT_EQ(30, format->framerate());
 }