Clean up static_cast<SVGFooElement*> by using toSVGFoo()

Source/core/svg/SVGAltGlyphItemElement.cpp

 /*
  * Copyright (C) 2011 Leo Yang <leoyang@webkit.org>
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 
 #if ENABLE(SVG_FONTS)
 #include "core/svg/SVGAltGlyphItemElement.h"
 
-#include "SVGNames.h"
 #include "core/svg/SVGGlyphRefElement.h"
 
 namespace WebCore {
 
 inline SVGAltGlyphItemElement::SVGAltGlyphItemElement(Document& document)
     : SVGElement(SVGNames::altGlyphItemTag, document)
 {
     ScriptWrappable::init(this);
 }
 
@@ skipping 22 matching lines @@
                 return false;
             }
         }
     }
     return !glyphNames.isEmpty();
 }
 
 }
 
 #endif