Update the nine patch layer to use UI resources

cc/layers/scrollbar_layer_unittest.cc

 // 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.
 
 #include "base/containers/hash_tables.h"
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/debug/test_web_graphics_context_3d.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/painted_scrollbar_layer.h"
 #include "cc/layers/painted_scrollbar_layer_impl.h"
@@ skipping 523 matching lines @@
       total_ui_resource_deleted_++;
     }
   }
 
   size_t UIResourceCount() { return ui_resource_bitmap_map_.size(); }
   int TotalUIResourceDeleted() { return total_ui_resource_deleted_; }
   int TotalUIResourceCreated() { return total_ui_resource_created_; }
 
   gfx::Size ui_resource_size(UIResourceId id) {
     UIResourceBitmapMap::iterator iter = ui_resource_bitmap_map_.find(id);
-    if (iter != ui_resource_bitmap_map_.end() && iter->second.get())
-      return iter->second->GetSize();
+    if (iter != ui_resource_bitmap_map_.end())
+      return iter->second.GetSize();
     return gfx::Size();
   }
 
  private:
-  typedef base::hash_map<UIResourceId, scoped_refptr<UIResourceBitmap> >
+  typedef base::hash_map<UIResourceId, UIResourceBitmap>
       UIResourceBitmapMap;
   UIResourceBitmapMap ui_resource_bitmap_map_;
 
   int next_id_;
   int total_ui_resource_created_;
   int total_ui_resource_deleted_;
 };
 
 
 class ScrollbarLayerTestResourceCreation : public testing::Test {
@@ skipping 163 matching lines @@
 TEST_F(ScaledScrollbarLayerTestResourceCreation, ScaledResourceUpload) {
   // Pick a test scale that moves the scrollbar's (non-zero) position to
   // a non-pixel-aligned location.
   TestResourceUpload(.041f);
   TestResourceUpload(1.41f);
   TestResourceUpload(4.1f);
 }
 
 }  // namespace
 }  // namespace cc