Revert of Remove MediaStreamTrack.getSources().

content/renderer/media/media_stream_center.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_CENTER_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_CENTER_H_
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "third_party/WebKit/public/platform/WebMediaStream.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamCenter.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
+#include "third_party/WebKit/public/platform/WebMediaStreamTrackSourcesRequest.h"
 
 namespace blink {
 class WebAudioSourceProvider;
 class WebMediaStreamCenterClient;
 }
 
 namespace content {
 class PeerConnectionDependencyFactory;
 
 class CONTENT_EXPORT MediaStreamCenter
@@ skipping 31 matching lines @@
   bool didRemoveMediaStreamTrack(
       const blink::WebMediaStream& stream,
       const blink::WebMediaStreamTrack& track) override;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamCenter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_CENTER_H_