Remove support for the externalResourcesRequired attribute.

Source/core/svg/SVGFontElement.h

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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 SVGFontElement_h
 #define SVGFontElement_h
 
 #if ENABLE(SVG_FONTS)
 #include "SVGNames.h"
 #include "core/svg/SVGAnimatedBoolean.h"
 #include "core/svg/SVGElement.h"
-#include "core/svg/SVGExternalResourcesRequired.h"
 #include "core/svg/SVGGlyphMap.h"
 #include "core/svg/SVGParserUtilities.h"
 
 namespace WebCore {
 
 // Describe an SVG <hkern>/<vkern> element
 struct SVGKerningPair {
     float kerning;
     UnicodeRanges unicodeRange1;
     UnicodeRanges unicodeRange2;
     HashSet<String> unicodeName1;
     HashSet<String> unicodeName2;
     HashSet<String> glyphName1;
     HashSet<String> glyphName2;
 
     SVGKerningPair()
         : kerning(0)
     {
     }
 };
 
 typedef Vector<SVGKerningPair> KerningPairVector;
 
 class SVGMissingGlyphElement;
 
-class SVGFontElement FINAL : public SVGElement
-                           , public SVGExternalResourcesRequired {
+class SVGFontElement FINAL : public SVGElement {
 public:
     static PassRefPtr<SVGFontElement> create(const QualifiedName&, Document&);
 
     void invalidateGlyphCache();
     void collectGlyphsForString(const String&, Vector<SVGGlyph>&);
     void collectGlyphsForGlyphName(const String&, Vector<SVGGlyph>&);
 
     float horizontalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
     float verticalKerningForPairOfStringsAndGlyphs(const String& u1, const String& g1, const String& u2, const String& g2) const;
 
     // Used by SimpleFontData/WidthIterator.
     SVGGlyph svgGlyphForGlyph(Glyph);
     Glyph missingGlyph();
 
     SVGMissingGlyphElement* firstMissingGlyphElement() const;
 
 private:
     SVGFontElement(const QualifiedName&, Document&);
 
     virtual bool rendererIsNeeded(const RenderStyle&) { return false; }
 
     void ensureGlyphCache();
     void registerLigaturesInGlyphCache(Vector<String>&);
 
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGFontElement)
-        DECLARE_ANIMATED_BOOLEAN(ExternalResourcesRequired, externalResourcesRequired)
     END_DECLARE_ANIMATED_PROPERTIES
 
     KerningPairVector m_horizontalKerningPairs;
     KerningPairVector m_verticalKerningPairs;
     SVGGlyphMap m_glyphMap;
     Glyph m_missingGlyph;
     bool m_isGlyphCacheValid;
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGFontElement, hasTagName(SVGNames::fontTag));
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG_FONTS)
 #endif