Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/svg/RenderSVGResourceContainer.h

 /*
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 78 matching lines @@
 
 template<typename Renderer>
 Renderer* getRenderSVGResourceById(Document& document, const AtomicString& id)
 {
     if (RenderSVGResourceContainer* container = getRenderSVGResourceContainerById(document, id))
         return container->cast<Renderer>();
 
     return 0;
 }
 
-inline RenderSVGResourceContainer* toRenderSVGResourceContainer(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGResourceContainer());
-    return static_cast<RenderSVGResourceContainer*>(object);
-}
-
-inline const RenderSVGResourceContainer* toRenderSVGResourceContainer(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGResourceContainer());
-    return static_cast<const RenderSVGResourceContainer*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderSVGResourceContainer(const RenderSVGResourceContainer*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGResourceContainer, isSVGResourceContainer());
 
 }
 
 #endif