Make Comment constructable

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.
  *
@@ skipping 19 matching lines @@
     : CharacterData(document, text, CreateOther)
 {
     ScriptWrappable::init(this);
 }
 
 PassRefPtr<Comment> Comment::create(Document* document, const String& text)
 {
     return adoptRef(new Comment(document, text));
 }
 
+PassRefPtr<Comment> Comment::create(ScriptExecutionContext* context, const String& text)
+{
+    return adoptRef(new Comment(toDocument(context), 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());
 }
 
 bool Comment::childTypeAllowed(NodeType) const
 {
     return false;
 }
 
 } // namespace WebCore