Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderTableCol.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 85 matching lines @@
     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
 
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
 
     RenderTable* table() const;
 
     RenderObjectChildList m_children;
     unsigned m_span;
 };
 
-inline RenderTableCol* toRenderTableCol(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderTableCol());
-    return static_cast<RenderTableCol*>(object);
-}
-
-inline const RenderTableCol* toRenderTableCol(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderTableCol());
-    return static_cast<const RenderTableCol*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderTableCol(const RenderTableCol*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableCol, isRenderTableCol());
 
 }
 
 #endif