Introduce typed Node/Element iterators for range-based for loops of C++11.

Source/core/html/HTMLFormElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.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
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 }
 
 PassRefPtrWillBeRawPtr<HTMLFormControlsCollection> HTMLFormElement::elements()
 {
     return ensureCachedCollection<HTMLFormControlsCollection>(FormControls);
 }
 
 void HTMLFormElement::collectAssociatedElements(Node& root, FormAssociatedElement::List& elements) const
 {
     elements.clear();
-    for (HTMLElement* element = Traversal<HTMLElement>::firstWithin(root); element; element = Traversal<HTMLElement>::next(*element)) {
+    for (HTMLElement& element : Traversal<HTMLElement>::from(root)) {
         FormAssociatedElement* associatedElement = 0;
-        if (element->isFormControlElement())
-            associatedElement = toHTMLFormControlElement(element);
-        else if (isHTMLObjectElement(*element))
-            associatedElement = toHTMLObjectElement(element);
+        if (element.isFormControlElement())
+            associatedElement = toHTMLFormControlElement(&element);
+        else if (isHTMLObjectElement(element))
+            associatedElement = toHTMLObjectElement(&element);
         else
             continue;
         if (associatedElement->form()== this)
             elements.append(associatedElement);
     }
 }
 
 // This function should be const conceptually. However we update some fields
 // because of lazy evaluation.
 const FormAssociatedElement::List& HTMLFormElement::associatedElements() const
 {
     if (!m_associatedElementsAreDirty)
         return m_associatedElements;
     HTMLFormElement* mutableThis = const_cast<HTMLFormElement*>(this);
     Node* scope = mutableThis;
     if (m_hasElementsAssociatedByParser)
         scope = &NodeTraversal::highestAncestorOrSelf(*mutableThis);
     if (inDocument() && treeScope().idTargetObserverRegistry().hasObservers(fastGetAttribute(idAttr)))
         scope = &treeScope().rootNode();
     ASSERT(scope);
     collectAssociatedElements(*scope, mutableThis->m_associatedElements);
     mutableThis->m_associatedElementsAreDirty = false;
     return m_associatedElements;
 }
 
 void HTMLFormElement::collectImageElements(Node& root, WillBeHeapVector<RawPtrWillBeMember<HTMLImageElement> >& elements)
 {
     elements.clear();
-    for (HTMLImageElement* image = Traversal<HTMLImageElement>::firstWithin(root); image; image = Traversal<HTMLImageElement>::next(*image)) {
-        if (image->formOwner() == this)
-            elements.append(image);
+    for (HTMLImageElement& image : Traversal<HTMLImageElement>::from(root)) {
+        if (image.formOwner() == this)
+            elements.append(&image);
     }
 }
 
 const WillBeHeapVector<RawPtrWillBeMember<HTMLImageElement> >& HTMLFormElement::imageElements()
 {
     if (!m_imageElementsAreDirty)
         return m_imageElements;
     collectImageElements(m_hasElementsAssociatedByParser ? NodeTraversal::highestAncestorOrSelf(*this) : *this, m_imageElements);
     m_imageElementsAreDirty = false;
     return m_imageElements;
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 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace