Have EditCommand classes deal with Document references, not pointers

Source/core/editing/IndentOutdentCommand.h

Index: Source/core/editing/IndentOutdentCommand.h
diff --git a/Source/core/editing/IndentOutdentCommand.h b/Source/core/editing/IndentOutdentCommand.h
index 7a49ac53e8897e320ab92a2f512db65c3b522e57..b90d8ec380a18339df086247b1dc7064d2b7691f 100644
--- a/Source/core/editing/IndentOutdentCommand.h
+++ b/Source/core/editing/IndentOutdentCommand.h
@@ -34,7 +34,7 @@ namespace WebCore {
 class IndentOutdentCommand : public ApplyBlockElementCommand {
 public:
     enum EIndentType { Indent, Outdent };
-    static PassRefPtr<IndentOutdentCommand> create(Document* document, EIndentType type, int marginInPixels = 0)
+    static PassRefPtr<IndentOutdentCommand> create(Document& document, EIndentType type, int marginInPixels = 0)
     {
         return adoptRef(new IndentOutdentCommand(document, type, marginInPixels));
     }
@@ -42,7 +42,7 @@ public:
     virtual bool preservesTypingStyle() const { return true; }
 
 private:
-    IndentOutdentCommand(Document*, EIndentType, int marginInPixels);
+    IndentOutdentCommand(Document&, EIndentType, int marginInPixels);
 
     virtual EditAction editingAction() const { return m_typeOfAction == Indent ? EditActionIndent : EditActionOutdent; }