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

Source/core/html/HTMLMapElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 92 matching lines @@
     // Either the id or name will be used depending on the order the attributes are parsed.
 
     if (isIdAttributeName(name) || name == nameAttr) {
         if (isIdAttributeName(name)) {
             // Call base class so that hasID bit gets set.
             HTMLElement::parseAttribute(name, value);
             if (document().isHTMLDocument())
                 return;
         }
         if (inDocument())
-            treeScope().removeImageMap(this);
+            treeScope()->removeImageMap(this);
         String mapName = value;
         if (mapName[0] == '#')
             mapName = mapName.substring(1);
         m_name = document().isHTMLDocument() ? mapName.lower() : mapName;
         if (inDocument())
-            treeScope().addImageMap(this);
+            treeScope()->addImageMap(this);
 
         return;
     }
 
     HTMLElement::parseAttribute(name, value);
 }
 
 PassRefPtr<HTMLCollection> HTMLMapElement::areas()
 {
     return ensureCachedHTMLCollection(MapAreas);
 }
 
 Node::InsertionNotificationRequest HTMLMapElement::insertedInto(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument())
-        treeScope().addImageMap(this);
+        treeScope()->addImageMap(this);
     return HTMLElement::insertedInto(insertionPoint);
 }
 
 void HTMLMapElement::removedFrom(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument())
-        treeScope().removeImageMap(this);
+        treeScope()->removeImageMap(this);
     HTMLElement::removedFrom(insertionPoint);
 }
 
 }