Have NodeTraversal::nextSkippingChildren() take a reference

Source/core/html/HTMLDialogElement.cpp

 /*
  * Copyright (C) 2012 Google 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
@@ skipping 34 matching lines @@
     for (Node* node = dialog->firstChild(); node; node = next) {
         if (node->isElementNode() && toElement(node)->isFormControlElement()) {
             HTMLFormControlElement* control = toHTMLFormControlElement(node);
             if (control->isAutofocusable()) {
                 control->focus();
                 control->setAutofocused();
                 return;
             }
         }
         if (node->hasTagName(dialogTag))
-            next = NodeTraversal::nextSkippingChildren(node, dialog);
+            next = NodeTraversal::nextSkippingChildren(*node, dialog);
         else
             next = NodeTraversal::next(*node, dialog);
     }
 }
 
 static void inertSubtreesChanged(Document& document)
 {
     // When a modal dialog opens or closes, nodes all over the accessibility
     // tree can change inertness which means they must be added or removed from
     // the tree. The most foolproof way is to clear the entire tree and rebuild
@@ skipping 108 matching lines @@
 }
 
 bool HTMLDialogElement::shouldBeReparentedUnderRenderView(const RenderStyle* style) const
 {
     if (style && style->position() == AbsolutePosition)
         return true;
     return Element::shouldBeReparentedUnderRenderView(style);
 }
 
 } // namespace WebCore