Have EditCommand classes deal with Document references, not pointers

Source/core/editing/RemoveCSSPropertyCommand.h

Index: Source/core/editing/RemoveCSSPropertyCommand.h
diff --git a/Source/core/editing/RemoveCSSPropertyCommand.h b/Source/core/editing/RemoveCSSPropertyCommand.h
index 7bdf5ad165aa8ec43a3028d401bfbca0d478ddfb..d64a71b4f82c467f7051afe590697f45e2683dfd 100644
--- a/Source/core/editing/RemoveCSSPropertyCommand.h
+++ b/Source/core/editing/RemoveCSSPropertyCommand.h
@@ -35,13 +35,13 @@ class Element;
 
 class RemoveCSSPropertyCommand : public SimpleEditCommand {
 public:
-    static PassRefPtr<RemoveCSSPropertyCommand> create(Document* document, PassRefPtr<Element> element, CSSPropertyID property)
+    static PassRefPtr<RemoveCSSPropertyCommand> create(Document& document, PassRefPtr<Element> element, CSSPropertyID property)
     {
         return adoptRef(new RemoveCSSPropertyCommand(document, element, property));
     }
 
 private:
-    RemoveCSSPropertyCommand(Document*, PassRefPtr<Element>, CSSPropertyID);
+    RemoveCSSPropertyCommand(Document&, PassRefPtr<Element>, CSSPropertyID);
     ~RemoveCSSPropertyCommand();
 
     virtual void doApply() OVERRIDE;