Drop [LegacyImplementedInBaseClass] from SVGURIReference IDL interface

Source/core/svg/SVGAltGlyphElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * 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.
  *
@@ skipping 26 matching lines @@
                                  public SVGURIReference {
 public:
     static PassRefPtr<SVGAltGlyphElement> create(Document&);
 
     const AtomicString& glyphRef() const;
     void setGlyphRef(const AtomicString&, ExceptionState&);
     const AtomicString& format() const;
     void setFormat(const AtomicString&, ExceptionState&);
 
     bool hasValidGlyphElements(Vector<AtomicString>& glyphNames) const;
-    SVGAnimatedString* href() { return m_href.get(); }
 
 private:
     explicit SVGAltGlyphElement(Document&);
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
-    RefPtr<SVGAnimatedString> m_href;
     BEGIN_DECLARE_ANIMATED_PROPERTIES(SVGAltGlyphElement)
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
 DEFINE_NODE_TYPE_CASTS(SVGAltGlyphElement, hasTagName(SVGNames::altGlyphTag));
 
 } // namespace WebCore
 
 #endif
 #endif