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diff --git a/chromium/content/renderer/media/media_stream_video_capturer_source.h b/chromium/content/renderer/media/media_stream_video_capturer_source.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_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
+#define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_
+
+#include "base/callback.h"
+#include "base/gtest_prod_util.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "base/threading/thread_checker.h"
+#include "content/common/media/video_capture.h"
+#include "content/renderer/media/media_stream_video_source.h"
+
+namespace content {
+
+// VideoCapturerDelegate is a delegate used by MediaStreamVideoCapturerSource
+// for local video capturer. It uses VideoCaptureImplManager to start / stop
+// and receive I420 frames from Chrome's video capture implementation.
+//
+// This is a render thread only object.
+class CONTENT_EXPORT VideoCapturerDelegate
+    : public base::RefCountedThreadSafe<VideoCapturerDelegate> {
+ public:
+  typedef base::Callback<void(bool running)> RunningCallback;
+
+  explicit VideoCapturerDelegate(
+      const StreamDeviceInfo& device_info);
+
+  // Collects the formats that can currently be used.
+  // |max_requested_height| and |max_requested_width| is used by Tab and Screen
+  // capture to decide what resolution to generate.
+  // |callback| is triggered when the formats have been collected.
+  virtual void GetCurrentSupportedFormats(
+      int max_requested_width,
+      int max_requested_height,
+      const VideoCaptureDeviceFormatsCB& callback);
+
+  // Starts capturing frames using the resolution in |params|.
+  // |new_frame_callback| is triggered when a new video frame is available.
+  // If capturing is started successfully then |running_callback| will be
+  // called with a parameter of true.
+  // If capturing fails to start or stopped due to an external event then
+  // |running_callback| will be called with a parameter of false.
+  virtual void StartCapture(
+      const media::VideoCaptureParams& params,
+      const VideoCaptureDeliverFrameCB& new_frame_callback,
+      const RunningCallback& running_callback);
+
+  // Stops capturing frames and clears all callbacks including the
+  // SupportedFormatsCallback callback.
+  virtual void StopCapture();
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(MediaStreamVideoCapturerSourceTest, Ended);
+  friend class base::RefCountedThreadSafe<VideoCapturerDelegate>;
+  friend class MockVideoCapturerDelegate;
+
+  virtual ~VideoCapturerDelegate();
+
+  void OnStateUpdateOnRenderThread(VideoCaptureState state);
+  void OnDeviceFormatsInUseReceived(const media::VideoCaptureFormats& formats);
+  void OnDeviceSupportedFormatsEnumerated(
+      const media::VideoCaptureFormats& formats);
+
+  // The id identifies which video capture device is used for this video
+  // capture session.
+  media::VideoCaptureSessionId session_id_;
+  base::Closure release_device_cb_;
+  base::Closure stop_capture_cb_;
+
+  bool is_screen_cast_;
+  bool got_first_frame_;
+
+  // |running_callback| is provided to this class in StartCapture and must be
+  // valid until StopCapture is called.
+  RunningCallback running_callback_;
+
+  VideoCaptureDeviceFormatsCB source_formats_callback_;
+
+  // Bound to the render thread.
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoCapturerDelegate);
+};
+
+// Owned by WebMediaStreamSource in Blink as a representation of a video
+// stream coming from a camera.
+// This is a render thread only object. All methods must be called on the
+// render thread.
+class CONTENT_EXPORT MediaStreamVideoCapturerSource
+    : public MediaStreamVideoSource {
+ public:
+  MediaStreamVideoCapturerSource(
+      const StreamDeviceInfo& device_info,
+      const SourceStoppedCallback& stop_callback,
+      const scoped_refptr<VideoCapturerDelegate>& delegate);
+
+  virtual ~MediaStreamVideoCapturerSource();
+
+ protected:
+  // Implements MediaStreamVideoSource.
+  virtual void GetCurrentSupportedFormats(
+      int max_requested_width,
+      int max_requested_height,
+      const VideoCaptureDeviceFormatsCB& callback) OVERRIDE;
+
+  virtual void StartSourceImpl(
+      const media::VideoCaptureParams& params,
+      const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE;
+
+  virtual void StopSourceImpl() OVERRIDE;
+
+ private:
+  // The delegate that provides video frames.
+  scoped_refptr<VideoCapturerDelegate> delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoCapturerSource);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_CAPTURER_SOURCE_H_