cc: remove virtual from Layer::SetContentsOpaque

cc/layers/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_LAYERS_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 142 matching lines @@
   const FilterOperations& filters() const { return inputs_.filters; }
 
   // Background filters are filters applied to what is behind this layer, when
   // they are viewed through non-opaque regions in this layer. They are used
   // through the WebLayer interface, and are not exposed to HTML.
   void SetBackgroundFilters(const FilterOperations& filters);
   const FilterOperations& background_filters() const {
     return inputs_.background_filters;
   }
 
-  virtual void SetContentsOpaque(bool opaque);
+  void SetContentsOpaque(bool opaque);
   bool contents_opaque() const { return inputs_.contents_opaque; }
 
   void SetPosition(const gfx::PointF& position);
   gfx::PointF position() const { return inputs_.position; }
 
   // A layer that is a container for fixed position layers cannot be both
   // scrollable and have a non-identity transform.
   void SetIsContainerForFixedPositionLayers(bool container);
   bool IsContainerForFixedPositionLayers() const;
 
@@ skipping 517 matching lines @@
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_