Introduce NodeTraversal::ancestorsOf() and inclusiveAncestors() for range-based for loop

third_party/WebKit/Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * 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
@@ skipping 393 matching lines @@
 {
     ASSERT(clientElement);
 
     // If we're not yet in a document, this function will be called again from insertedInto(). Do nothing now.
     if (!inShadowIncludingDocument())
         return;
 
     // An element wants to notify us that its own relative lengths state changed.
     // Register it in the relative length map, and register us in the parent relative length map.
     // Register the parent in the grandparents map, etc. Repeat procedure until the root of the SVG tree.
-    for (ContainerNode* currentNode = this; currentNode && currentNode->isSVGElement(); currentNode = currentNode->parentNode()) {
-        SVGElement* currentElement = toSVGElement(currentNode);
-        ASSERT(!currentElement->m_inRelativeLengthClientsInvalidation);
+    for (Node& currentNode : NodeTraversal::inclusiveAncestorsOf(*this)) {
+        if (!currentNode.isSVGElement())
+            break;
+        SVGElement& currentElement = toSVGElement(currentNode);
+        ASSERT(!currentElement.m_inRelativeLengthClientsInvalidation);
 
-        bool hadRelativeLengths = currentElement->hasRelativeLengths();
+        bool hadRelativeLengths = currentElement.hasRelativeLengths();
         if (clientHasRelativeLengths)
-            currentElement->m_elementsWithRelativeLengths.add(clientElement);
+            currentElement.m_elementsWithRelativeLengths.add(clientElement);
         else
-            currentElement->m_elementsWithRelativeLengths.remove(clientElement);
+            currentElement.m_elementsWithRelativeLengths.remove(clientElement);
 
         // If the relative length state hasn't changed, we can stop propagating the notification.
-        if (hadRelativeLengths == currentElement->hasRelativeLengths())
+        if (hadRelativeLengths == currentElement.hasRelativeLengths())
             return;
 
-        clientElement = currentElement;
+        clientElement = &currentElement;
         clientHasRelativeLengths = clientElement->hasRelativeLengths();
     }
 
     // Register root SVG elements for top level viewport change notifications.
     if (isSVGSVGElement(*clientElement)) {
         SVGDocumentExtensions& svgExtensions = accessDocumentSVGExtensions();
         if (clientElement->hasRelativeLengths())
             svgExtensions.addSVGRootWithRelativeLengthDescendents(toSVGSVGElement(clientElement));
         else
             svgExtensions.removeSVGRootWithRelativeLengthDescendents(toSVGSVGElement(clientElement));
@@ skipping 737 matching lines @@
     Element::trace(visitor);
 }
 
 const AtomicString& SVGElement::eventParameterName()
 {
     DEFINE_STATIC_LOCAL(const AtomicString, evtString, ("evt"));
     return evtString;
 }
 
 } // namespace blink