Have Document::formController() return a reference

Source/core/html/HTMLInputElement.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, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 148 matching lines @@
 }
 
 HTMLInputElement::~HTMLInputElement()
 {
     // Need to remove form association while this is still an HTMLInputElement
     // so that virtual functions are called correctly.
     setForm(0);
     // setForm(0) may register this to a document-level radio button group.
     // We should unregister it to avoid accessing a deleted object.
     if (isRadioButton())
-        document().formController()->radioButtonGroupScope().removeButton(this);
+        document().formController().radioButtonGroupScope().removeButton(this);
     if (m_hasTouchEventHandler)
         document().didRemoveTouchEventHandler(this);
 }
 
 const AtomicString& HTMLInputElement::name() const
 {
     return m_name.isNull() ? emptyAtom : m_name;
 }
 
 Vector<FileChooserFileInfo> HTMLInputElement::filesFromFileInputFormControlState(const FormControlState& state)
@@ skipping 1246 matching lines @@
     ASSERT(!inDocument());
     resetListAttributeTargetObserver();
 }
 
 void HTMLInputElement::didMoveToNewDocument(Document& oldDocument)
 {
     if (hasImageLoader())
         imageLoader()->elementDidMoveToNewDocument();
 
     if (isRadioButton())
-        oldDocument.formController()->radioButtonGroupScope().removeButton(this);
+        oldDocument.formController().radioButtonGroupScope().removeButton(this);
     if (m_hasTouchEventHandler)
         oldDocument.didRemoveTouchEventHandler(this);
 
     if (m_hasTouchEventHandler)
         document().didAddTouchEventHandler(this);
 
     HTMLTextFormControlElement::didMoveToNewDocument(oldDocument);
 }
 
 void HTMLInputElement::removeAllEventListeners()
@@ skipping 272 matching lines @@
     return 0;
 }
 
 RadioButtonGroupScope* HTMLInputElement::radioButtonGroupScope() const
 {
     if (!isRadioButton())
         return 0;
     if (HTMLFormElement* formElement = form())
         return &formElement->radioButtonGroupScope();
     if (inDocument())
-        return &document().formController()->radioButtonGroupScope();
+        return &document().formController().radioButtonGroupScope();
     return 0;
 }
 
 inline void HTMLInputElement::addToRadioButtonGroup()
 {
     if (RadioButtonGroupScope* scope = radioButtonGroupScope())
         scope->addButton(this);
 }
 
 inline void HTMLInputElement::removeFromRadioButtonGroup()
@@ skipping 128 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputTypeView->customStyleForRenderer(originalStyleForRenderer());
 }
 #endif
 
 } // namespace