Have Document::formController() return a reference

Source/core/html/HTMLFormControlElementWithState.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 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 28 matching lines @@
 {
 }
 
 HTMLFormControlElementWithState::~HTMLFormControlElementWithState()
 {
 }
 
 Node::InsertionNotificationRequest HTMLFormControlElementWithState::insertedInto(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument() && !containingShadowRoot())
-        document().formController()->registerStatefulFormControl(*this);
+        document().formController().registerStatefulFormControl(*this);
     return HTMLFormControlElement::insertedInto(insertionPoint);
 }
 
 void HTMLFormControlElementWithState::removedFrom(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument() && !containingShadowRoot() && !insertionPoint->containingShadowRoot())
-        document().formController()->unregisterStatefulFormControl(*this);
+        document().formController().unregisterStatefulFormControl(*this);
     HTMLFormControlElement::removedFrom(insertionPoint);
 }
 
 bool HTMLFormControlElementWithState::shouldAutocomplete() const
 {
     if (!form())
         return true;
     return form()->shouldAutocomplete();
 }
 
@@ skipping 13 matching lines @@
 }
 
 FormControlState HTMLFormControlElementWithState::saveFormControlState() const
 {
     return FormControlState();
 }
 
 void HTMLFormControlElementWithState::finishParsingChildren()
 {
     HTMLFormControlElement::finishParsingChildren();
-    document().formController()->restoreControlStateFor(*this);
+    document().formController().restoreControlStateFor(*this);
 }
 
 bool HTMLFormControlElementWithState::isFormControlElementWithState() const
 {
     return true;
 }
 
 } // namespace Webcore