Update the nine patch layer to use UI resources

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index e362f84b4ca09789afc7c0ea734edab6f5039e9a..2b6f8d1113cad102a0d18729b2091f4b8ea7fa6d 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -86,18 +86,35 @@ struct CC_EXPORT RendererCapabilities {
   bool using_discard_framebuffer;
 };
 
-struct CC_EXPORT UIResourceRequest {
+class CC_EXPORT UIResourceRequest {
+ public:
   enum UIResourceRequestType {
     UIResourceCreate,
     UIResourceDelete,
     UIResourceInvalidRequest
   };
 
-  UIResourceRequest();
+  UIResourceRequest(UIResourceRequestType type, UIResourceId id);
+  UIResourceRequest(UIResourceRequestType type,
+                    UIResourceId id,
+                    const UIResourceBitmap& bitmap);
+  UIResourceRequest(const UIResourceRequest& request);
+
   ~UIResourceRequest();
-  UIResourceRequestType type;
-  UIResourceId id;
-  scoped_refptr<UIResourceBitmap> bitmap;
+
+  UIResourceRequestType GetType() const { return type_; }
+  UIResourceId GetId() const { return id_; }
+  UIResourceBitmap GetBitmap() const {
+    DCHECK(bitmap_);
+    return *bitmap_.get();
+  }
+
+  UIResourceRequest& operator=(const UIResourceRequest& request);
+
+ private:
+  UIResourceRequestType type_;
+  UIResourceId id_;
+  scoped_ptr<UIResourceBitmap> bitmap_;
 };
 
 class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
@@ -287,6 +304,8 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
   // Deletes a UI resource.  May safely be called more than once.
   virtual void DeleteUIResource(UIResourceId id);
 
+  virtual gfx::Size GetUIResourceSize(UIResourceId id) const;
+
   bool UsingSharedMemoryResources();
   int id() const { return tree_id_; }
 
@@ -325,7 +344,13 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
 
   void RecreateUIResources(bool resource_lost);
 
-  typedef base::hash_map<UIResourceId, UIResourceClient*> UIResourceClientMap;
+  struct UIResourceClientData {
+    UIResourceClient* client;
+    gfx::Size size;
+  };
+
+  typedef base::hash_map<UIResourceId, UIResourceClientData>
+      UIResourceClientMap;
   UIResourceClientMap ui_resource_client_map_;
   int next_ui_resource_id_;