Have CharacterData constructor take a Document reference in argument

Source/core/dom/Comment.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2009 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/dom/Comment.h"
 
 #include "core/dom/Document.h"
 
 namespace WebCore {
 
-inline Comment::Comment(Document* document, const String& text)
+inline Comment::Comment(Document& document, const String& text)
     : CharacterData(document, text, CreateOther)
 {
     ScriptWrappable::init(this);
 }
 
-PassRefPtr<Comment> Comment::create(Document* document, const String& text)
+PassRefPtr<Comment> Comment::create(Document& document, const String& text)
 {
     return adoptRef(new Comment(document, text));
 }
 
 String Comment::nodeName() const
 {
     return commentAtom.string();
 }
 
 Node::NodeType Comment::nodeType() const
 {
     return COMMENT_NODE;
 }
 
 PassRefPtr<Node> Comment::cloneNode(bool /*deep*/)
 {
-    return create(&document(), data());
+    return create(document(), data());
 }
 
 bool Comment::childTypeAllowed(NodeType) const
 {
     return false;
 }
 
 } // namespace WebCore