Drop [LegacyImplementedInBaseClass] from SVGURIReference IDL interface

Source/core/svg/SVGGlyphRefElement.h

 /*
  * 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
@@ skipping 28 matching lines @@
     const AtomicString& glyphRef() const;
     void setGlyphRef(const AtomicString&);
     float x() const { return m_x; }
     void setX(float);
     float y() const { return m_y; }
     void setY(float);
     float dx() const { return m_dx; }
     void setDx(float);
     float dy() const { return m_dy; }
     void setDy(float);
-    SVGAnimatedString* href() { return m_href.get(); }
 
 private:
     explicit SVGGlyphRefElement(Document&);
 
     template<typename CharType>
     void parseAttributeInternal(const QualifiedName&, const AtomicString&);
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; }
 
-    RefPtr<SVGAnimatedString> m_href;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGGlyphRefElement)
     END_DECLARE_ANIMATED_PROPERTIES
 
     float m_x;
     float m_y;
     float m_dx;
     float m_dy;
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGGlyphRefElement, hasTagName(SVGNames::glyphRefTag));
 
 }
 
 #endif
 #endif