Generate toCSSFooValue() for CSSCanvasValue, CSSCrossfadeValue, CSSImageGeneratorValue, CSSImageVal…

Source/core/css/CSSImageValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2012 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 49 matching lines @@
 private:
     explicit CSSImageValue(const String& url);
     CSSImageValue(const String& url, StyleImage*);
 
     String m_url;
     RefPtr<StyleImage> m_image;
     bool m_accessedImage;
     AtomicString m_initiatorName;
 };
 
-inline CSSImageValue* toCSSImageValue(CSSValue* value)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!value || value->isImageValue());
-    return static_cast<CSSImageValue*>(value);
-}
-
-inline const CSSImageValue* toCSSImageValue(const CSSValue* value)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!value || value->isImageValue());
-    return static_cast<const CSSImageValue*>(value);
-}
-
-// Catch unneeded cast.
-void toCSSImageValue(const CSSImageValue*);
+DEFINE_CSS_VALUE_TYPE_CASTS(ImageValue);
 
 } // namespace WebCore
 
 #endif // CSSImageValue_h