[cc] Enable specifying a overhang/gutter texture.

cc/resources/scoped_ui_resource.cc

 // Copyright 2013 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 "cc/resources/scoped_ui_resource.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "cc/trees/layer_tree_host.h"
 
@@ skipping 14 matching lines @@
 
 // User must make sure that host is still valid before this object goes out of
 // scope.
 ScopedUIResource::~ScopedUIResource() {
   if (id_) {
     DCHECK(host_);
     host_->DeleteUIResource(id_);
   }
 }
 
+gfx::Size ScopedUIResource::GetSize() const {
+  return bitmap_->GetSize();
+}
+
 scoped_refptr<UIResourceBitmap> ScopedUIResource::GetBitmap(
     UIResourceId uid,
     bool resource_lost) {
   return bitmap_;
 }
 
 ScopedUIResource::ScopedUIResource() {}
 
 }  // namespace cc