Make sure MediaStreamVideoSource support cropping.

content/renderer/media/webrtc/webrtc_video_capturer_adapter.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_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_
 
+#include <vector>
+
 #include "base/compiler_specific.h"
 #include "content/common/content_export.h"
 #include "media/base/video_frame.h"
 #include "media/video/capture/video_capture_types.h"
 #include "third_party/libjingle/source/talk/media/base/videocapturer.h"
 
 namespace content {
 
 // WebRtcVideoCapturerAdapter implements a simple cricket::VideoCapturer that is
 // used for VideoCapturing in libJingle and especially in PeerConnections.
@@ skipping 19 matching lines @@
   // These methods are accessed from a libJingle worker thread.
   virtual cricket::CaptureState Start(
       const cricket::VideoFormat& capture_format) OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual bool IsRunning() OVERRIDE;
   virtual bool GetPreferredFourccs(std::vector<uint32>* fourccs) OVERRIDE;
   virtual bool GetBestCaptureFormat(const cricket::VideoFormat& desired,
                                     cricket::VideoFormat* best_format) OVERRIDE;
   virtual bool IsScreencast() const OVERRIDE;
 
+  void UpdateI420Buffer(const scoped_refptr<media::VideoFrame>& src);
+
  private:
   const bool is_screencast_;
   bool running_;
   base::TimeDelta first_frame_timestamp_;
+  // |buffer_| used if cropping is needed. It is created only if needed and
+  // owned by WebRtcVideoCapturerAdapter. If its created, it exists until
+  // WebRtcVideoCapturerAdapter is destroyed.
+  uint8* buffer_;
+  size_t buffer_size_;
+  scoped_ptr<cricket::CapturedFrame> captured_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcVideoCapturerAdapter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_WEBRTC_VIDEO_CAPTURER_ADAPTER_H_