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

Source/core/html/FormAssociatedElement.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 89 matching lines @@
 
 HTMLFormElement* FormAssociatedElement::findAssociatedForm(const HTMLElement* element, HTMLFormElement* currentAssociatedForm)
 {
     const AtomicString& formId(element->fastGetAttribute(formAttr));
     if (!formId.isNull() && element->inDocument()) {
         // The HTML5 spec says that the element should be associated with
         // the first element in the document to have an ID that equal to
         // the value of form attribute, so we put the result of
         // treeScope()->getElementById() over the given element.
         HTMLFormElement* newForm = 0;
-        Element* newFormCandidate = element->treeScope().getElementById(formId);
+        Element* newFormCandidate = element->treeScope()->getElementById(formId);
         if (newFormCandidate && newFormCandidate->hasTagName(formTag))
             newForm = toHTMLFormElement(newFormCandidate);
         return newForm;
     }
 
     if (!currentAssociatedForm)
         return element->findFormAncestor();
 
     return currentAssociatedForm;
 }
@@ skipping 165 matching lines @@
 {
     return const_cast<HTMLElement*>(toHTMLElement(static_cast<const FormAssociatedElement*>(associatedElement)));
 }
 
 PassOwnPtr<FormAttributeTargetObserver> FormAttributeTargetObserver::create(const AtomicString& id, FormAssociatedElement* element)
 {
     return adoptPtr(new FormAttributeTargetObserver(id, element));
 }
 
 FormAttributeTargetObserver::FormAttributeTargetObserver(const AtomicString& id, FormAssociatedElement* element)
-    : IdTargetObserver(toHTMLElement(element)->treeScope().idTargetObserverRegistry(), id)
+    : IdTargetObserver(toHTMLElement(element)->treeScope()->idTargetObserverRegistry(), id)
     , m_element(element)
 {
 }
 
 void FormAttributeTargetObserver::idTargetChanged()
 {
     m_element->formAttributeTargetChanged();
 }
 
 } // namespace Webcore