Reduce number of header includes in SVG

Source/core/svg/SVGGlyphMap.h

 /*
  * Copyright (C) 2008 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,
  * 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.
  */
 
 #ifndef SVGGlyphMap_h
 #define SVGGlyphMap_h
 
 #if ENABLE(SVG_FONTS)
 #include "core/platform/graphics/SVGGlyph.h"
 #include "core/platform/graphics/SurrogatePairAwareTextIterator.h"
-#include "core/svg/SVGGlyphElement.h"
 
 #include <wtf/HashMap.h>
 #include <wtf/Vector.h>
 
 namespace WebCore {
 
 struct GlyphMapNode;
 class SVGFontData;
 
 typedef HashMap<UChar32, RefPtr<GlyphMapNode> > GlyphMapLayer;
@@ skipping 120 matching lines @@
     GlyphMapLayer m_rootLayer;
     Vector<SVGGlyph> m_glyphTable;
     HashMap<String, Glyph> m_namedGlyphs;
     int m_currentPriority;
 };
 
 }
 
 #endif // ENABLE(SVG_FONTS)
 #endif // SVGGlyphMap_h