Change ui::wm::Shadow to use cc::NinePatchLayer.

ui/compositor/layer.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 UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
 #include "ui/gfx/transform.h"
 
 class SkCanvas;
 
 namespace cc {
 class ContentLayer;
 class CopyOutputRequest;
 class DelegatedFrameProvider;
 class DelegatedRendererLayer;
 class Layer;
+class NinePatchLayer;
 class ResourceUpdateQueue;
 class SolidColorLayer;
 class TextureLayer;
 struct ReturnedResource;
 typedef std::vector<ReturnedResource> ReturnedResourceArray;
 }
 
 namespace ui {
 
 class Compositor;
@@ skipping 217 matching lines @@
   // Begins showing delegated frames from the |frame_provider|.
   void SetShowDelegatedContent(cc::DelegatedFrameProvider* frame_provider,
                                gfx::Size frame_size_in_dip);
 
   bool has_external_content() {
     return texture_layer_.get() || delegated_renderer_layer_.get();
   }
 
   void SetShowPaintedContent();
 
+  void SetShowNinePatch();

[sky, 2014/07/14 15:30:06]

I would have expected nine patch to be a new type, eg LAYER_TYPE_NINE_PATCH. Is
there a reason it isn't?

[hshi1, 2014/07/14 21:23:37]

Done.

+
+  void UpdateNinePatchBitmap(const SkBitmap& bitmap,

[sky, 2014/07/14 15:30:06]

You need to add descriptions of the arguments.

[hshi1, 2014/07/14 21:23:37]

Done.

+                             const gfx::Rect& aperture,
+                             const gfx::Rect& border);
+
   // Sets the layer's fill color.  May only be called for LAYER_SOLID_COLOR.
   void SetColor(SkColor color);
 
   // Adds |invalid_rect| to the Layer's pending invalid rect and calls
   // ScheduleDraw(). Returns false if the paint request is ignored.
   bool SchedulePaint(const gfx::Rect& invalid_rect);
 
   // Schedules a redraw of the layer tree at the compositor.
   // Note that this _does not_ invalidate any region of this layer; use
   // SchedulePaint() for that.
@@ skipping 176 matching lines @@
 
   scoped_refptr<LayerAnimator> animator_;
 
   // Animations that are passed to AddThreadedAnimation before this layer is
   // added to a tree.
   cc::ScopedPtrVector<cc::Animation> pending_threaded_animations_;
 
   // Ownership of the layer is held through one of the strongly typed layer
   // pointers, depending on which sort of layer this is.
   scoped_refptr<cc::Layer> content_layer_;
+  scoped_refptr<cc::NinePatchLayer> nine_patch_layer_;
   scoped_refptr<cc::TextureLayer> texture_layer_;
   scoped_refptr<cc::SolidColorLayer> solid_color_layer_;
   scoped_refptr<cc::DelegatedRendererLayer> delegated_renderer_layer_;
   cc::Layer* cc_layer_;
 
   // A cached copy of |Compositor::device_scale_factor()|.
   float device_scale_factor_;
 
   // The mailbox used by texture_layer_.
   cc::TextureMailbox mailbox_;
 
   // The callback to release the mailbox. This is only set after
   // SetTextureMailbox is called, before we give it to the TextureLayer.
   scoped_ptr<cc::SingleReleaseCallback> mailbox_release_callback_;
 
   // The size of the frame or texture in DIP, set when SetShowDelegatedContent
   // or SetTextureMailbox was called.
   gfx::Size frame_size_in_dip_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_