Have EditCommand classes deal with Document references, not pointers

Source/core/editing/ModifySelectionListLevel.h

 /*
  * Copyright (C) 2006, 2010 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 17 matching lines @@
 
 #include "core/editing/CompositeEditCommand.h"
 
 namespace WebCore {
 
 // ModifySelectionListLevelCommand provides functions useful for both increasing and decreasing the list level.
 // It is the base class of IncreaseSelectionListLevelCommand and DecreaseSelectionListLevelCommand.
 // It is not used on its own.
 class ModifySelectionListLevelCommand : public CompositeEditCommand {
 protected:
-    explicit ModifySelectionListLevelCommand(Document*);
+    explicit ModifySelectionListLevelCommand(Document&);
 
     void appendSiblingNodeRange(Node* startNode, Node* endNode, Element* newParent);
     void insertSiblingNodeRangeBefore(Node* startNode, Node* endNode, Node* refNode);
     void insertSiblingNodeRangeAfter(Node* startNode, Node* endNode, Node* refNode);
 
 private:
     virtual bool preservesTypingStyle() const;
 };
 
 // IncreaseSelectionListLevelCommand moves the selected list items one level deeper.
 class IncreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
 public:
-    static bool canIncreaseSelectionListLevel(Document*);
-    static PassRefPtr<Node> increaseSelectionListLevel(Document*);
-    static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document*);
-    static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document*);
+    static bool canIncreaseSelectionListLevel(Document&);
+    static PassRefPtr<Node> increaseSelectionListLevel(Document&);
+    static PassRefPtr<Node> increaseSelectionListLevelOrdered(Document&);
+    static PassRefPtr<Node> increaseSelectionListLevelUnordered(Document&);
 
 private:
     enum Type { InheritedListType, OrderedList, UnorderedList };
-    static PassRefPtr<Node> increaseSelectionListLevel(Document*, Type);
+    static PassRefPtr<Node> increaseSelectionListLevel(Document&, Type);
 
-    static PassRefPtr<IncreaseSelectionListLevelCommand> create(Document* document, Type type)
+    static PassRefPtr<IncreaseSelectionListLevelCommand> create(Document& document, Type type)
     {
         return adoptRef(new IncreaseSelectionListLevelCommand(document, type));
     }
 
-    IncreaseSelectionListLevelCommand(Document*, Type);
+    IncreaseSelectionListLevelCommand(Document&, Type);
 
     virtual void doApply();
 
     Type m_listType;
     RefPtr<Node> m_listElement;
 };
 
 // DecreaseSelectionListLevelCommand moves the selected list items one level shallower.
 class DecreaseSelectionListLevelCommand : public ModifySelectionListLevelCommand {
 public:
-    static bool canDecreaseSelectionListLevel(Document*);
-    static void decreaseSelectionListLevel(Document*);
+    static bool canDecreaseSelectionListLevel(Document&);
+    static void decreaseSelectionListLevel(Document&);
 
 private:
-    static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document* document)
+    static PassRefPtr<DecreaseSelectionListLevelCommand> create(Document& document)
     {
         return adoptRef(new DecreaseSelectionListLevelCommand(document));
     }
 
-    explicit DecreaseSelectionListLevelCommand(Document*);
+    explicit DecreaseSelectionListLevelCommand(Document&);
 
     virtual void doApply();
 };
 
 } // namespace WebCore
 
 #endif // ModifySelectionListLevel_h