cc: Remove the opaque rect return-parameter from ContentLayerClient.

cc/blink/web_content_layer_impl.h

 // Copyright 2014 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_BLINK_WEB_CONTENT_LAYER_IMPL_H_
 #define CC_BLINK_WEB_CONTENT_LAYER_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/blink/cc_blink_export.h"
 #include "cc/blink/web_layer_impl.h"
@@ skipping 20 matching lines @@
   virtual blink::WebLayer* layer();
   virtual void setDoubleSided(bool double_sided);
   virtual void setDrawCheckerboardForMissingTiles(bool checkerboard);
 
  protected:
   virtual ~WebContentLayerImpl();
 
   // ContentLayerClient implementation.
   virtual void PaintContents(SkCanvas* canvas,
                              const gfx::Rect& clip,
-                             gfx::RectF* opaque,
                              ContentLayerClient::GraphicsContextStatus
                                  graphics_context_status) OVERRIDE;
   virtual void DidChangeLayerCanUseLCDText() OVERRIDE;
   virtual bool FillsBoundsCompletely() const OVERRIDE;
 
   scoped_ptr<WebLayerImpl> layer_;
   blink::WebContentLayerClient* client_;
   bool draws_content_;
 
  private:
   bool can_use_lcd_text_;
   bool ignore_lcd_text_change_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentLayerImpl);
 };
 
 }  // namespace cc_blink
 
 #endif  // CC_BLINK_WEB_CONTENT_LAYER_IMPL_H_