WIP (Introduce WTF::NonNullPtr<T>.)

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 1507 matching lines @@
 }
 
 HTMLDataListElement* HTMLInputElement::dataList() const
 {
     if (!m_hasNonEmptyList)
         return 0;
 
     if (!m_inputType->shouldRespectListAttribute())
         return 0;
 
-    Element* element = treeScope().getElementById(fastGetAttribute(listAttr));
+    Element* element = treeScope()->getElementById(fastGetAttribute(listAttr));
     if (!element)
         return 0;
     if (!element->hasTagName(datalistTag))
         return 0;
 
     return toHTMLDataListElement(element);
 }
 
 void HTMLInputElement::resetListAttributeTargetObserver()
 {
@@ skipping 262 matching lines @@
 {
     setAttribute(widthAttr, String::number(width));
 }
 
 PassOwnPtr<ListAttributeTargetObserver> ListAttributeTargetObserver::create(const AtomicString& id, HTMLInputElement* element)
 {
     return adoptPtr(new ListAttributeTargetObserver(id, element));
 }
 
 ListAttributeTargetObserver::ListAttributeTargetObserver(const AtomicString& id, HTMLInputElement* element)
-    : IdTargetObserver(element->treeScope().idTargetObserverRegistry(), id)
+    : IdTargetObserver(element->treeScope()->idTargetObserverRegistry(), id)
     , m_element(element)
 {
 }
 
 void ListAttributeTargetObserver::idTargetChanged()
 {
     m_element->listAttributeTargetChanged();
 }
 
 void HTMLInputElement::setRangeText(const String& replacement, ExceptionState& es)
@@ skipping 65 matching lines @@
 }
 
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
 PassRefPtr<RenderStyle> HTMLInputElement::customStyleForRenderer()
 {
     return m_inputTypeView->customStyleForRenderer(originalStyleForRenderer());
 }
 #endif
 
 } // namespace