Make sure MediaStreamVideoSource support cropping.

content/renderer/media/media_stream_video_source.h

 // 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_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/media_stream_source.h"
 #include "media/base/video_frame.h"
+#include "media/base/video_frame_pool.h"
 #include "media/video/capture/video_capture_types.h"
 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
 
 namespace media {
 class VideoFrame;
 }
 
 namespace content {
@@ skipping 86 matching lines @@
   // call OnSupportedFormats after this method has been called. After this
   // method has been called, MediaStreamVideoSource may be deleted.
   virtual void StopSourceImpl() = 0;
 
  private:
   // Creates a webrtc::VideoSourceInterface used by libjingle.
   void InitAdapter();
 
   // Finds the first constraints in |requested_constraints_| that can be
   // fulfilled. |best_format| is set to the video resolution that can be
-  // fulfilled. |resulting_constraints| is set to the found constraints in
+  // fulfilled. |frame_output_size| is the requested frame size after cropping.
+  // |resulting_constraints| is set to the found constraints in
   // |requested_constraints_|.
   bool FindBestFormatWithConstraints(
       const media::VideoCaptureFormats& formats,
       media::VideoCaptureFormat* best_format,
+      gfx::Size* frame_output_size,
       blink::WebMediaConstraints* resulting_constraints);
 
   // Trigger all cached callbacks from AddTrack. AddTrack is successful
   // if the capture delegate has started and the constraints provided in
   // AddTrack match the format that was used to start the device.
   void FinalizeAddTrack();
 
   enum State {
     NEW,
     RETRIEVING_CAPABILITIES,
     STARTING,
     STARTED,
     ENDED
   };
   State state_;
 
   media::VideoCaptureFormat current_format_;
   blink::WebMediaConstraints current_constraints_;
+  gfx::Size frame_output_size_;
 
   struct RequestedConstraints {
     RequestedConstraints(const blink::WebMediaConstraints& constraints,
                          const ConstraintsCallback& callback);
     ~RequestedConstraints();
 
     blink::WebMediaConstraints constraints;
     ConstraintsCallback callback;
   };
   std::vector<RequestedConstraints> requested_constraints_;
 
   media::VideoCaptureFormats supported_formats_;
 
   // TODO(perkj): The below classes use webrtc/libjingle types. The goal is to
   // get rid of them as far as possible.
   MediaStreamDependencyFactory* factory_;
   scoped_refptr<webrtc::VideoSourceInterface> adapter_;
   WebRtcVideoCapturerAdapter* capture_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_VIDEO_SOURCE_H_