Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/svg/RenderSVGShape.h

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2006 Apple Computer, Inc
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  * Copyright (C) 2011 University of Szeged
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 105 matching lines @@
     FloatRect m_repaintBoundingBoxExcludingShadow;
     AffineTransform m_localTransform;
     OwnPtr<Path> m_path;
     Vector<MarkerPosition> m_markerPositions;
 
     bool m_needsBoundariesUpdate : 1;
     bool m_needsShapeUpdate : 1;
     bool m_needsTransformUpdate : 1;
 };
 
-inline RenderSVGShape* toRenderSVGShape(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGShape());
-    return static_cast<RenderSVGShape*>(object);
-}
-
-inline const RenderSVGShape* toRenderSVGShape(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGShape());
-    return static_cast<const RenderSVGShape*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderSVGShape(const RenderSVGShape*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGShape, isSVGShape());
 
 }
 
 #endif