Add toHTMLDocument() convenience methods that take a reference

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2860 matching lines @@
             setAttribute(HTMLNames::classAttr, getClassAttribute());
     }
 }
 
 void Element::updateNamedItemRegistration(const AtomicString& oldName, const AtomicString& newName)
 {
     if (!document().isHTMLDocument())
         return;
 
     if (!oldName.isEmpty())
-        toHTMLDocument(&document())->removeNamedItem(oldName);
+        toHTMLDocument(document()).removeNamedItem(oldName);
 
     if (!newName.isEmpty())
-        toHTMLDocument(&document())->addNamedItem(newName);
+        toHTMLDocument(document()).addNamedItem(newName);
 }
 
 void Element::updateExtraNamedItemRegistration(const AtomicString& oldId, const AtomicString& newId)
 {
     if (!document().isHTMLDocument())
         return;
 
     if (!oldId.isEmpty())
-        toHTMLDocument(&document())->removeExtraNamedItem(oldId);
+        toHTMLDocument(document()).removeExtraNamedItem(oldId);
 
     if (!newId.isEmpty())
-        toHTMLDocument(&document())->addExtraNamedItem(newId);
+        toHTMLDocument(document()).addExtraNamedItem(newId);
 }
 
 PassRefPtr<HTMLCollection> Element::ensureCachedHTMLCollection(CollectionType type)
 {
     if (HTMLCollection* collection = cachedHTMLCollection(type))
         return collection;
 
     RefPtr<HTMLCollection> collection;
     if (type == TableRows) {
         ASSERT(hasTagName(tableTag));
@@ skipping 727 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore