cc: Create a cc::ScrollbarThemePainter and an adapter class in compositor bindings.

cc/content_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 CC_CONTENT_LAYER_H_
 #define CC_CONTENT_LAYER_H_
 
 #include "base/basictypes.h"
 #include "cc/cc_export.h"
 #include "cc/layer_painter.h"
 #include "cc/tiled_layer.h"
 
 class SkCanvas;
 
 namespace cc {
 
 class ContentLayerClient;
 class LayerUpdater;
 
 class CC_EXPORT ContentLayerPainter : public LayerPainter {
 public:
     static scoped_ptr<ContentLayerPainter> create(ContentLayerClient*);
 
-    virtual void paint(SkCanvas*, const gfx::Rect& contentRect, gfx::RectF& opaque) OVERRIDE;
+    virtual void paint(SkCanvas*, gfx::Rect contentRect, gfx::RectF& opaque) OVERRIDE;
 
 private:
     explicit ContentLayerPainter(ContentLayerClient*);
 
     ContentLayerClient* m_client;
 
     DISALLOW_COPY_AND_ASSIGN(ContentLayerPainter);
 };
 
 // A layer that renders its contents into an SkCanvas.
@@ skipping 29 matching lines @@
     ContentLayerClient* m_client;
     scoped_refptr<LayerUpdater> m_updater;
 
     bool m_useLCDText;
     int m_lcdTextChangeCount;
     static const int kLCDTextMaxChangeCount;
 };
 
 }
 #endif  // CC_CONTENT_LAYER_H_