Avoid going through WebWidget::composite to composite a RenderWidget

content/renderer/render_widget.h

 // Copyright (c) 2012 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_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 227 matching lines @@
   void PaintDebugBorder(const gfx::Rect& rect, SkCanvas* canvas);
 
   bool IsRenderingVSynced();
   void AnimationCallback();
   void AnimateIfNeeded();
   void InvalidationCallback();
   void DoDeferredUpdateAndSendInputAck();
   void DoDeferredUpdate();
   void DoDeferredClose();
   void DoDeferredSetWindowRect(const WebKit::WebRect& pos);
+  virtual void Composite();
 
   // Set the background of the render widget to a bitmap. The bitmap will be
   // tiled in both directions if it isn't big enough to fill the area. This is
   // mainly intended to be used in conjuction with WebView::SetIsTransparent().
   virtual void SetBackground(const SkBitmap& bitmap);
 
   // Resizes the render widget.
   void Resize(const gfx::Size& new_size,
               const gfx::Rect& resizer_rect,
               bool is_fullscreen,
@@ skipping 379 matching lines @@
 
   // Specified whether the compositor will run in its own thread.
   bool is_threaded_compositing_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_