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diff --git a/chromium/content/renderer/media/video_frame_deliverer.h b/chromium/content/renderer/media/video_frame_deliverer.h
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+++ b/chromium/content/renderer/media/video_frame_deliverer.h
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+// Copyright 2014 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_VIDEO_FRAME_DELIVERER_H_
+#define CONTENT_RENDERER_MEDIA_VIDEO_FRAME_DELIVERER_H_
+
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/media/video_capture.h"
+#include "content/public/renderer/media_stream_video_sink.h"
+#include "media/base/video_frame.h"
+
+namespace content {
+
+// VideoFrameDeliverer is a helper class used for registering
+// VideoCaptureDeliverFrameCB on the main render thread to receive video frames
+// on the IO-thread.
+// Its used by MediaStreamVideoTrack.
+class VideoFrameDeliverer
+    : public base::RefCountedThreadSafe<VideoFrameDeliverer> {
+ public:
+  explicit VideoFrameDeliverer(
+      const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
+
+  // Add |callback| to receive video frames on the IO-thread.
+  // Must be called on the main render thread.
+  void AddCallback(void* id, const VideoCaptureDeliverFrameCB& callback);
+
+  // Removes |callback| associated with |id| from receiving video frames if |id|
+  // has been added. It is ok to call RemoveCallback even if the |id| has not
+  // been added. Note that the added callback will be reset on the main thread.
+  // Must be called on the main render thread.
+  void RemoveCallback(void* id);
+
+  // Triggers all registered callbacks with |frame|, |format| and
+  // |estimated_capture_time| as parameters. Must be called on the IO-thread.
+  virtual void DeliverFrameOnIO(
+      const scoped_refptr<media::VideoFrame>& frame,
+      const media::VideoCaptureFormat& format,
+      const base::TimeTicks& estimated_capture_time);
+
+  const scoped_refptr<base::MessageLoopProxy>& io_message_loop() const {
+    return io_message_loop_;
+  }
+
+ protected:
+  void AddCallbackOnIO(void* id, const VideoCaptureDeliverFrameCB& callback);
+
+  // Callback will be removed and then reset on the designated message loop.
+  // It is ok to call RemoveCallback even if |id| has not been added.
+  void RemoveCallbackOnIO(
+      void* id, const scoped_refptr<base::MessageLoopProxy>& message_loop);
+
+ protected:
+  virtual ~VideoFrameDeliverer();
+  const base::ThreadChecker& thread_checker() const {
+    return thread_checker_;
+  }
+
+ private:
+  friend class base::RefCountedThreadSafe<VideoFrameDeliverer>;
+
+  // Used to DCHECK that AddCallback and RemoveCallback are called on the main
+  // render thread.
+  base::ThreadChecker thread_checker_;
+  scoped_refptr<base::MessageLoopProxy> io_message_loop_;
+
+  typedef std::pair<void*, VideoCaptureDeliverFrameCB> VideoIdCallbackPair;
+  std::vector<VideoIdCallbackPair> callbacks_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoFrameDeliverer);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_VIDEO_FRAME_DELIVERER_H_