cc: 9patch: fix shadow scaling issue

cc/layers/nine_patch_layer_impl.h

 // Copyright 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 CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_
 #define CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 87 matching lines @@
   class Patch {
    public:
     Patch(const gfx::Rect& image_rect, const gfx::Rect& layer_rect);
 
     gfx::Rect image_rect;
     gfx::Rect layer_rect;
   };
 
   const char* LayerTypeAsString() const override;
 
+  bool CanUseOcclusion();
   void CheckGeometryLimitations();
 
   std::vector<Patch> ComputeQuadsWithOcclusion() const;
   std::vector<Patch> ComputeQuadsWithoutOcclusion() const;
 
   // The transparent center region that shows the parent layer's contents in
   // image space.
   gfx::Rect image_aperture_;
 
   // An inset border that the patches will be mapped to.
   gfx::Rect border_;
 
   bool fill_center_;
 
   bool nearest_neighbor_;
 
   gfx::Rect layer_occlusion_;
 
   DISALLOW_COPY_AND_ASSIGN(NinePatchLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_NINE_PATCH_LAYER_IMPL_H_