Have SVGURIReference API deal with Document references, not pointers

Source/core/svg/SVGTextPathElement.cpp

 /*
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2010 Rob Buis <rwlbuis@gmail.com>
  *
  * 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,
@@ skipping 142 matching lines @@
     return false;
 }
 
 void SVGTextPathElement::buildPendingResource()
 {
     clearResourceReferences();
     if (!inDocument())
         return;
 
     String id;
-    Element* target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), &document(), &id);
+    Element* target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), document(), &id);
     if (!target) {
         // Do not register as pending if we are already pending this resource.
         if (document().accessSVGExtensions()->isElementPendingResource(this, id))
             return;
 
         if (!id.isEmpty()) {
             document().accessSVGExtensions()->addPendingResource(id, this);
             ASSERT(hasPendingResources());
         }
     } else if (target->hasTagName(SVGNames::pathTag)) {
@@ skipping 17 matching lines @@
         clearResourceReferences();
 }
 
 bool SVGTextPathElement::selfHasRelativeLengths() const
 {
     return startOffsetCurrentValue().isRelative()
         || SVGTextContentElement::selfHasRelativeLengths();
 }
 
 }