Move RenderSVGResource::cast() to RenderSVGResourceContainer

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 21 matching lines @@
                                    public RenderSVGResource {
 public:
     explicit RenderSVGResourceContainer(SVGElement*);
     virtual ~RenderSVGResourceContainer();
 
     virtual void layout() OVERRIDE;
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE FINAL;
 
     virtual bool isSVGResourceContainer() const OVERRIDE FINAL { return true; }
 
+    template<class Renderer>
+    Renderer* cast()
+    {
+        if (Renderer::s_resourceType == resourceType())
+            return static_cast<Renderer*>(this);
+
+        return 0;
+    }
+
     static AffineTransform transformOnNonScalingStroke(RenderObject*, const AffineTransform& resourceTransform);
 
     void idChanged();
     void addClientRenderLayer(Node*);
     void addClientRenderLayer(RenderLayer*);
     void removeClientRenderLayer(RenderLayer*);
 
     void invalidateCacheAndMarkForLayout(SubtreeLayoutScope* = 0);
 
 protected:
@@ skipping 54 matching lines @@
         return container->cast<Renderer>();
 
     return 0;
 }
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGResourceContainer, isSVGResourceContainer());
 
 }
 
 #endif