Use new Traversal<SVG*Element> API more in SVG code

Source/core/svg/SVGSVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google, Inc.
  *
  * 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 54 matching lines @@
 namespace WebCore {
 
 inline SVGSVGElement::SVGSVGElement(Document& doc)
     : SVGGraphicsElement(SVGNames::svgTag, doc)
     , SVGFitToViewBox(this)
     , m_x(SVGAnimatedLength::create(this, SVGNames::xAttr, SVGLength::create(LengthModeWidth)))
     , m_y(SVGAnimatedLength::create(this, SVGNames::yAttr, SVGLength::create(LengthModeHeight)))
     , m_width(SVGAnimatedLength::create(this, SVGNames::widthAttr, SVGLength::create(LengthModeWidth)))
     , m_height(SVGAnimatedLength::create(this, SVGNames::heightAttr, SVGLength::create(LengthModeHeight)))
     , m_useCurrentView(false)
-    , m_timeContainer(SMILTimeContainer::create(this))
+    , m_timeContainer(SMILTimeContainer::create(*this))
     , m_translation(SVGPoint::create())
 {
     ScriptWrappable::init(this);
 
     m_width->setDefaultValueAsString("100%");
     m_height->setDefaultValueAsString("100%");
 
     addToPropertyMap(m_x);
     addToPropertyMap(m_y);
     addToPropertyMap(m_width);
@@ skipping 296 matching lines @@
     if (referenceElement) {
         // Only the common subtree needs to be traversed.
         if (contains(referenceElement)) {
             root = referenceElement;
         } else if (!isDescendantOf(referenceElement)) {
             // No common subtree.
             return StaticNodeList::adopt(nodes);
         }
     }
 
-    for (Element* element = ElementTraversal::firstWithin(*root); element;
-        element = ElementTraversal::next(*element, root)) {
-
-        if (!WebCore::isSVGGraphicsElement(*element))
-            continue;
-
-        SVGElement* svgElement = toSVGElement(element);
-        if (checkIntersectionOrEnclosure(*svgElement, rect, mode))
+    for (SVGGraphicsElement* element = Traversal<SVGGraphicsElement>::firstWithin(*root); element;
+        element = Traversal<SVGGraphicsElement>::next(*element, root)) {
+        if (checkIntersectionOrEnclosure(*element, rect, mode))
             nodes.append(element);
     }
 
     return StaticNodeList::adopt(nodes);
 }
 
 PassRefPtr<NodeList> SVGSVGElement::getIntersectionList(PassRefPtr<SVGRectTearOff> rect, SVGElement* referenceElement) const
 {
     document().updateLayoutIgnorePendingStylesheets();
 
@@ skipping 429 matching lines @@
     Vector<Element*>::const_iterator end = elements.end();
     for (Vector<Element*>::const_iterator it = elements.begin(); it != end; ++it) {
         if ((*it)->isDescendantOf(this))
             return *it;
     }
 
     return 0;
 }
 
 }