Have SVGURIReference API deal with Document references, not pointers

Source/core/svg/SVGGlyphRefElement.cpp

 /*
  * 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 40 matching lines @@
 
 PassRefPtr<SVGGlyphRefElement> SVGGlyphRefElement::create(const QualifiedName& tagName, Document* document)
 {
     return adoptRef(new SVGGlyphRefElement(tagName, document));
 }
 
 bool SVGGlyphRefElement::hasValidGlyphElement(String& glyphName) const
 {
     // FIXME: We only support xlink:href so far.
     // https://bugs.webkit.org/show_bug.cgi?id=64787
-    Element* element = targetElementFromIRIString(getAttribute(XLinkNames::hrefAttr), &document(), &glyphName);
+    Element* element = targetElementFromIRIString(getAttribute(XLinkNames::hrefAttr), document(), &glyphName);
     if (!element || !element->hasTagName(SVGNames::glyphTag))
         return false;
     return true;
 }
 
 template<typename CharType>
 void SVGGlyphRefElement::parseAttributeInternal(const QualifiedName& name, const AtomicString& value)
 {
     const CharType* ptr = value.isEmpty() ? 0 : value.string().getCharacters<CharType>();
     const CharType* end = ptr + value.length();
@@ skipping 57 matching lines @@
 void SVGGlyphRefElement::setDy(float dy)
 {
     // FIXME: Honor attribute change.
     // https://bugs.webkit.org/show_bug.cgi?id=64787
     m_dy = dy;
 }
 
 }
 
 #endif