Have ElementTraversal / NodeTraversal's next() methods take a reference

Source/core/html/forms/RadioInputType.cpp

 /*
  * Copyright (C) 2005, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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 66 matching lines @@
     // when using Spatial Navigation, we need to be able to navigate without
     // changing the selection.
     Document& document = element().document();
     if (isSpatialNavigationEnabled(document.frame()))
         return;
     bool forward = (key == "Down" || key == "Right");
 
     // We can only stay within the form's children if the form hasn't been demoted to a leaf because
     // of malformed HTML.
     Node* node = &element();
-    while ((node = (forward ? NodeTraversal::next(node) : NodeTraversal::previous(node)))) {
+    while ((node = (forward ? NodeTraversal::next(*node) : NodeTraversal::previous(node)))) {
         // Once we encounter a form element, we know we're through.
         if (node->hasTagName(formTag))
             break;
         // Look for more radio buttons.
         if (!node->hasTagName(inputTag))
             continue;
         HTMLInputElement* inputElement = toHTMLInputElement(node);
         if (inputElement->form() != element().form())
             break;
         if (inputElement->isRadioButton() && inputElement->name() == element().name() && inputElement->isFocusable()) {
@@ skipping 87 matching lines @@
 {
     return true;
 }
 
 bool RadioInputType::supportsIndeterminateAppearance() const
 {
     return false;
 }
 
 } // namespace WebCore