VideoCapture: Remove deep frame copy in the border to libJingle

content/renderer/media/webrtc/webrtc_video_capturer_adapter.h

Index: content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
diff --git a/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h b/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
index 52245526d3b6fd0e8edf4295dfa910c7cd39ed98..7ef45a1d4fcb3ea5ff1c72663f9c53eafed15011 100644
--- a/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
+++ b/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
@@ -48,19 +48,17 @@ class CONTENT_EXPORT WebRtcVideoCapturerAdapter
                                     cricket::VideoFormat* best_format) override;
   virtual bool IsScreencast() const override;
 
-  void UpdateI420Buffer(const scoped_refptr<media::VideoFrame>& src);
-
   // |thread_checker_| is bound to the libjingle worker thread.
   base::ThreadChecker thread_checker_;
 
   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_;
+
+  // This is an alias to the frame_factory_ in the base class
+  // cricket::VideoCapturer.
+  class MediaVideoFrameFactory;
+  MediaVideoFrameFactory* frame_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcVideoCapturerAdapter);
 };