Have CharacterData constructor take a Document reference in argument

Source/core/dom/Comment.cpp

Index: Source/core/dom/Comment.cpp
diff --git a/Source/core/dom/Comment.cpp b/Source/core/dom/Comment.cpp
index 9379d5971217d70d1299d414fa9158ae6a1e1825..186008aeceb9ec0f633f7ed1942d265038fd3b7b 100644
--- a/Source/core/dom/Comment.cpp
+++ b/Source/core/dom/Comment.cpp
@@ -26,13 +26,13 @@
 
 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));
 }
@@ -49,7 +49,7 @@ Node::NodeType Comment::nodeType() const
 
 PassRefPtr<Node> Comment::cloneNode(bool /*deep*/)
 {
-    return create(&document(), data());
+    return create(document(), data());
 }
 
 bool Comment::childTypeAllowed(NodeType) const