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

Source/core/html/HTMLFormControlElement.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 141 matching lines @@
     } else
         HTMLElement::parseAttribute(name, value);
 }
 
 void HTMLFormControlElement::disabledAttributeChanged()
 {
     setNeedsWillValidateCheck();
     didAffectSelector(AffectedSelectorDisabled | AffectedSelectorEnabled);
     if (renderer() && renderer()->style()->hasAppearance())
         RenderTheme::theme().stateChanged(renderer(), EnabledState);
-    if (isDisabledFormControl() && treeScope().adjustedFocusedElement() == this) {
+    if (isDisabledFormControl() && treeScope()->adjustedFocusedElement() == this) {
         // We might want to call blur(), but it's dangerous to dispatch events
         // here.
         document().setNeedsFocusedElementCheck();
     }
 }
 
 void HTMLFormControlElement::requiredAttributeChanged()
 {
     setNeedsValidityCheck();
     // Style recalculation is needed because style selectors may include
@@ skipping 312 matching lines @@
 HTMLFormControlElement* HTMLFormControlElement::enclosingFormControlElement(Node* node)
 {
     for (; node; node = node->parentNode()) {
         if (node->isElementNode() && toElement(node)->isFormControlElement())
             return toHTMLFormControlElement(node);
     }
     return 0;
 }
 
 } // namespace Webcore