Remove support for the externalResourcesRequired attribute.

Source/core/svg/SVGFontElement.cpp

 /*
  * 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.
  *
@@ skipping 16 matching lines @@
 #include "core/frame/UseCounter.h"
 #include "core/svg/SVGGlyphElement.h"
 #include "core/svg/SVGHKernElement.h"
 #include "core/svg/SVGMissingGlyphElement.h"
 #include "core/svg/SVGVKernElement.h"
 #include "wtf/ASCIICType.h"
 
 namespace WebCore {
 
 // Animated property definitions
-DEFINE_ANIMATED_BOOLEAN(SVGFontElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
 
 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGFontElement)
-    REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGElement)
 END_REGISTER_ANIMATED_PROPERTIES
 
 inline SVGFontElement::SVGFontElement(Document& document)
     : SVGElement(SVGNames::fontTag, document)
     , m_missingGlyph(0)
     , m_isGlyphCacheValid(false)
 {
     ScriptWrappable::init(this);
     registerAnimatedPropertiesForSVGFontElement();
@@ skipping 199 matching lines @@
 
 Glyph SVGFontElement::missingGlyph()
 {
     ensureGlyphCache();
     return m_missingGlyph;
 }
 
 }
 
 #endif // ENABLE(SVG_FONTS)