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

Source/core/html/HTMLFormElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple 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.
@@ skipping 47 matching lines @@
 
     String enctype() const { return m_attributes.encodingType(); }
     void setEnctype(const String&);
 
     String encoding() const { return m_attributes.encodingType(); }
     void setEncoding(const String& value) { setEnctype(value); }
 
     bool shouldAutocomplete() const;
 
     // FIXME: Should rename these two functions to say "form control" or "form-associated element" instead of "form element".
-    void registerFormElement(FormAssociatedElement*);
+    void registerFormElement(FormAssociatedElement&);
     void removeFormElement(FormAssociatedElement*);
 
     void registerImgElement(HTMLImageElement*);
     void removeImgElement(HTMLImageElement*);
 
     bool prepareForSubmission(Event*);
     void submit();
     void submitFromJavaScript();
     void reset();
 
@@ skipping 61 matching lines @@
     virtual bool shouldRegisterAsNamedItem() const OVERRIDE { return true; }
 
     virtual void copyNonAttributePropertiesFromElement(const Element&) OVERRIDE;
 
     void submitDialog(PassRefPtr<FormSubmission>);
     void submit(Event*, bool activateSubmitButton, bool processingUserGesture, FormSubmissionTrigger);
 
     void scheduleFormSubmission(PassRefPtr<FormSubmission>);
 
     unsigned formElementIndexWithFormAttribute(Element*, unsigned rangeStart, unsigned rangeEnd);
-    unsigned formElementIndex(FormAssociatedElement*);
+    unsigned formElementIndex(FormAssociatedElement&);
 
     // Returns true if the submission should proceed.
     bool validateInteractively(Event*);
 
     // Validates each of the controls, and stores controls of which 'invalid'
     // event was not canceled to the specified vector. Returns true if there
     // are any invalid controls in this form.
     bool checkInvalidControlsAndCollectUnhandled(Vector<RefPtr<FormAssociatedElement> >*, HTMLFormControlElement::CheckValidityDispatchEvents = HTMLFormControlElement::CheckValidityDispatchEventsAllowed);
 
     Node* elementFromPastNamesMap(const AtomicString&) const;
@@ skipping 24 matching lines @@
 
     Vector<RefPtr<Event> > m_pendingAutocompleteEvents;
     Timer<HTMLFormElement> m_requestAutocompleteTimer;
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLFormElement, hasTagName(HTMLNames::formTag));
 
 } // namespace WebCore
 
 #endif // HTMLFormElement_h