Ensure proper finalization of garbage-collected types.

Source/core/testing/LayerRectList.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "core/dom/ClientRect.h"
 #include "core/dom/Node.h"
 #include "core/testing/LayerRect.h"
 
 namespace WebCore {
 
 LayerRectList::LayerRectList()
 {
 }
 
-LayerRectList::~LayerRectList()
-{
-}
+DEFINE_EMPTY_DESTRUCTOR_WILL_BY_NONE(LayerRectList)
 
 unsigned LayerRectList::length() const
 {
     return m_list.size();
 }
 
 LayerRect* LayerRectList::item(unsigned index)
 {
     if (index >= m_list.size())
         return 0;
 
     return m_list[index].get();
 }
 
 void LayerRectList::append(PassRefPtr<Node> layerRootNode, const String& layerType, PassRefPtr<ClientRect> layerRelativeRect)
 {
     m_list.append(LayerRect::create(layerRootNode, layerType, layerRelativeRect));
 }
 
 void LayerRectList::trace(Visitor* visitor)
 {
     visitor->trace(m_list);
 }
 
 } // namespace WebCore