Have EditCommand classes deal with Document references, not pointers

Source/core/editing/DeleteFromTextNodeCommand.cpp

 /*
  * Copyright (C) 2005, 2008 Apple 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 16 matching lines @@
 #include "core/editing/DeleteFromTextNodeCommand.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/Document.h"
 #include "core/dom/Text.h"
 
 namespace WebCore {
 
 DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtr<Text> node, unsigned offset, unsigned count)
-    : SimpleEditCommand(&node->document())
+    : SimpleEditCommand(node->document())
     , m_node(node)
     , m_offset(offset)
     , m_count(count)
 {
     ASSERT(m_node);
     ASSERT(m_offset <= m_node->length());
     ASSERT(m_offset + m_count <= m_node->length());
 }
 
 void DeleteFromTextNodeCommand::doApply()
@@ skipping 22 matching lines @@
 }
 
 #ifndef NDEBUG
 void DeleteFromTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
 {
     addNodeAndDescendants(m_node.get(), nodes);
 }
 #endif
 
 } // namespace WebCore