Introduce DEFINE_RENDER_OBJECT_TYPE_CASTS to replace manual toRenderFoo, and use it

Source/core/rendering/RenderImage.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 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
@@ skipping 102 matching lines @@
     String m_altText;
     OwnPtr<RenderImageResource> m_imageResource;
     bool m_needsToSetSizeForAltText;
     bool m_didIncrementVisuallyNonEmptyPixelCount;
     bool m_isGeneratedContent;
     float m_imageDevicePixelRatio;
 
     friend class RenderImageScaleObserver;
 };
 
-inline RenderImage* toRenderImage(RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderImage());
-    return static_cast<RenderImage*>(object);
-}
-
-inline const RenderImage* toRenderImage(const RenderObject* object)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderImage());
-    return static_cast<const RenderImage*>(object);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toRenderImage(const RenderImage*);
+DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderImage, isRenderImage());
 
 } // namespace WebCore
 
 #endif // RenderImage_h