Have EditCommand classes deal with Document references, not pointers

Source/core/editing/CreateLinkCommand.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 13 matching lines @@
  */
 
 #include "config.h"
 #include "core/dom/Text.h"
 #include "core/editing/CreateLinkCommand.h"
 
 #include "core/html/HTMLAnchorElement.h"
 
 namespace WebCore {
 
-CreateLinkCommand::CreateLinkCommand(Document* document, const String& url)
+CreateLinkCommand::CreateLinkCommand(Document& document, const String& url)
     : CompositeEditCommand(document)
 {
     m_url = url;
 }
 
 void CreateLinkCommand::doApply()
 {
     if (endingSelection().isNone())
         return;
 
-    RefPtr<HTMLAnchorElement> anchorElement = HTMLAnchorElement::create(document());
+    RefPtr<HTMLAnchorElement> anchorElement = HTMLAnchorElement::create(&document());
     anchorElement->setHref(m_url);
 
     if (endingSelection().isRange())
         applyStyledElement(anchorElement.get());
     else {
         insertNodeAt(anchorElement.get(), endingSelection().start());
-        RefPtr<Text> textNode = Text::create(document(), m_url);
+        RefPtr<Text> textNode = Text::create(&document(), m_url);
         appendNode(textNode.get(), anchorElement.get());
         setEndingSelection(VisibleSelection(positionInParentBeforeNode(anchorElement.get()), positionInParentAfterNode(anchorElement.get()), DOWNSTREAM, endingSelection().isDirectional()));
     }
 }
 
 }