Replace open-coded toSVG<type> with DEFINE_SVG_PROPERTY_TYPE_CASTS

third_party/WebKit/Source/core/svg/SVGString.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 68 matching lines @@
 
     explicit SVGString(const String& value)
         : SVGPropertyBase(classType())
         , m_value(value)
     {
     }
 
     String m_value;
 };
 
-inline PassRefPtrWillBeRawPtr<SVGString> toSVGString(PassRefPtrWillBeRawPtr<SVGPropertyBase> passBase)
-{
-    RefPtrWillBeRawPtr<SVGPropertyBase> base = passBase;
-    ASSERT(base->type() == SVGString::classType());
-    return static_pointer_cast<SVGString>(base.release());
-}
+DEFINE_SVG_PROPERTY_TYPE_CASTS(SVGString);
 
 } // namespace blink
 
 #endif // SVGString_h