Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderInline.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. 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.
  *
@@ skipping 169 matching lines @@
     void paintOutlineForLine(GraphicsContext*, const LayoutPoint&, const LayoutRect& prevLine, const LayoutRect& thisLine,
                              const LayoutRect& nextLine, const Color);
     RenderBoxModelObject* continuationBefore(RenderObject* beforeChild);
 
     RenderObjectChildList m_children;
     RenderLineBoxList m_lineBoxes;   // All of the line boxes created for this inline flow.  For example, <i>Hello<br>world.</i> will have two <i> line boxes.
 
     bool m_alwaysCreateLineBoxes : 1;
 };
 
-inline RenderInline* toRenderInline(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderInline());
-    return static_cast<RenderInline*>(object);
-}
-
-inline const RenderInline* toRenderInline(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderInline());
-    return static_cast<const RenderInline*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderInline(const RenderInline*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderInline, isRenderInline());
 
 } // namespace WebCore
 
 #endif // RenderInline_h