Have SVGURIReference API deal with Document references, not pointers

Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 163 matching lines @@
         setTargetElement(0);
         return;
     }
 
     String id;
     String href = getAttribute(XLinkNames::hrefAttr);
     Element* target;
     if (href.isEmpty())
         target = parentNode() && parentNode()->isElementNode() ? toElement(parentNode()) : 0;
     else
-        target = SVGURIReference::targetElementFromIRIString(href, &document(), &id);
+        target = SVGURIReference::targetElementFromIRIString(href, document(), &id);
     SVGElement* svgTarget = target && target->isSVGElement() ? toSVGElement(target) : 0;
 
     if (svgTarget && !svgTarget->inDocument())
         svgTarget = 0;
 
     if (svgTarget != targetElement())
         setTargetElement(svgTarget);
 
     if (!svgTarget) {
         // Do not register as pending if we are already pending this resource.
@@ skipping 1038 matching lines @@
 }
 
 void SVGSMILElement::dispatchPendingEvent(SMILEventSender* eventSender)
 {
     ASSERT(eventSender == &smilEndEventSender() || eventSender == &smilBeginEventSender() || eventSender == &smilRepeatEventSender());
     const AtomicString& eventType = eventSender->eventType();
     dispatchEvent(Event::create(eventType));
 }
 
 }