Have Document::formController() return a reference

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
@@ skipping 66 matching lines @@
 }
 
 PassRefPtr<HTMLFormElement> HTMLFormElement::create(Document& document)
 {
     UseCounter::count(document, UseCounter::FormElement);
     return adoptRef(new HTMLFormElement(document));
 }
 
 HTMLFormElement::~HTMLFormElement()
 {
-    document().formController()->willDeleteForm(this);
+    document().formController().willDeleteForm(this);
 }
 
 bool HTMLFormElement::rendererIsNeeded(const RenderStyle& style)
 {
     if (!m_wasDemoted)
         return HTMLElement::rendererIsNeeded(style);
 
     ContainerNode* node = parentNode();
     RenderObject* parentRenderer = node->renderer();
     // FIXME: Shouldn't we also check for table caption (see |formIsTablePart| below).
@@ skipping 670 matching lines @@
 }
 
 bool HTMLFormElement::shouldAutocomplete() const
 {
     return !equalIgnoringCase(fastGetAttribute(autocompleteAttr), "off");
 }
 
 void HTMLFormElement::finishParsingChildren()
 {
     HTMLElement::finishParsingChildren();
-    document().formController()->restoreControlStateIn(*this);
+    document().formController().restoreControlStateIn(*this);
     m_didFinishParsingChildren = true;
 }
 
 void HTMLFormElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     m_wasDemoted = static_cast<const HTMLFormElement&>(source).m_wasDemoted;
     HTMLElement::copyNonAttributePropertiesFromElement(source);
 }
 
 void HTMLFormElement::anonymousNamedGetter(const AtomicString& name, bool& returnValue0Enabled, RefPtr<RadioNodeList>& returnValue0, bool& returnValue1Enabled, RefPtr<Element>& returnValue1)
@@ skipping 26 matching lines @@
 }
 
 void HTMLFormElement::setDemoted(bool demoted)
 {
     if (demoted)
         UseCounter::count(document(), UseCounter::DemotedFormElement);
     m_wasDemoted = demoted;
 }
 
 } // namespace