Added support for YUV videos to the software compositor.

cc/video_layer.h

 // Copyright 2010 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 VideoLayerChromium_h
 #define VideoLayerChromium_h
 
+#include "base/callback.h"
 #include "cc/layer.h"
 
 namespace WebKit {
+class WebVideoFrame;
 class WebVideoFrameProvider;
 }
 
+namespace media {
+class VideoFrame;
+}
+
 namespace cc {
 
 class VideoLayerImpl;
 
 // A Layer that contains a Video element.
 class VideoLayer : public Layer {
 public:
-    static scoped_refptr<VideoLayer> create(WebKit::WebVideoFrameProvider*);
+    typedef base::Callback<media::VideoFrame* (WebKit::WebVideoFrame*)> FrameUnwrapper;
+
+    static scoped_refptr<VideoLayer> create(WebKit::WebVideoFrameProvider*,
+                                            const FrameUnwrapper&);
 
     virtual scoped_ptr<LayerImpl> createLayerImpl() OVERRIDE;
 
 private:
-    explicit VideoLayer(WebKit::WebVideoFrameProvider*);
+    VideoLayer(WebKit::WebVideoFrameProvider*, const FrameUnwrapper&);
     virtual ~VideoLayer();
 
     // This pointer is only for passing to VideoLayerImpl's constructor. It should never be dereferenced by this class.
     WebKit::WebVideoFrameProvider* m_provider;
+    FrameUnwrapper m_unwrapper;
 };
 
-}
+}  // namespace cc
+
 #endif