3D Compositing in <browser>, first draft.

content/browser/renderer_host/render_widget_host_view_win.h

Index: content/browser/renderer_host/render_widget_host_view_win.h
diff --git a/content/browser/renderer_host/render_widget_host_view_win.h b/content/browser/renderer_host/render_widget_host_view_win.h
index 5e59278ff4c0ce4a6de7ad673bae8d6f5a8e9f07..9b3f027f0b4ba573adf9067da9306f98ddb4719d 100644
--- a/content/browser/renderer_host/render_widget_host_view_win.h
+++ b/content/browser/renderer_host/render_widget_host_view_win.h
@@ -203,7 +203,6 @@ class RenderWidgetHostViewWin
       bool has_horizontal_scrollbar) OVERRIDE;
   virtual void SetScrollOffsetPinning(
       bool is_pinned_to_left, bool is_pinned_to_right) OVERRIDE;
-  virtual gfx::GLSurfaceHandle GetCompositingSurface() OVERRIDE;
   virtual void AcceleratedSurfaceBuffersSwapped(
       const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
       int gpu_host_id) OVERRIDE;
@@ -559,6 +558,19 @@ class RenderWidgetHostViewWin
 
   scoped_ptr<ui::GestureRecognizer> gesture_recognizer_;
 
+  class CompositingDelegateWin : public CompositingDelegate {
+   public:
+    virtual gfx::GLSurfaceHandle GetCompositingSurface() OVERRIDE; 
+    virtual bool ResizeNeedsNewSurface() OVERRIDE;
+
+   private:
+    friend class RenderWidgetHostViewWin;
+    CompositingDelegateWin(RenderWidgetHostViewWin* view)
+      : view_(view)
+    {}
+    RenderWidgetHostViewWin* view_;
+  };
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewWin);
 };