Have EditCommand classes deal with Document references, not pointers

Source/core/editing/RemoveFormatCommand.cpp

 /*
  * Copyright (C) 2007 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2010 Google 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
@@ skipping 22 matching lines @@
 #include "core/dom/Element.h"
 #include "core/editing/ApplyStyleCommand.h"
 #include "core/editing/EditingStyle.h"
 #include "core/editing/FrameSelection.h"
 #include "core/page/Frame.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
-RemoveFormatCommand::RemoveFormatCommand(Document* document)
+RemoveFormatCommand::RemoveFormatCommand(Document& document)
     : CompositeEditCommand(document)
 {
 }
 
 static bool isElementForRemoveFormatCommand(const Element* element)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, elements, ());
     if (elements.isEmpty()) {
         elements.add(acronymTag);
         elements.add(bTag);
@@ skipping 18 matching lines @@
         elements.add(supTag);
         elements.add(ttTag);
         elements.add(uTag);
         elements.add(varTag);
     }
     return elements.contains(element->tagQName());
 }
 
 void RemoveFormatCommand::doApply()
 {
-    Frame* frame = document()->frame();
+    Frame* frame = document().frame();
 
     if (!frame->selection()->selection().isNonOrphanedCaretOrRange())
         return;
 
     // Get the default style for this editable root, it's the style that we'll give the
     // content that we're operating on.
     Node* root = frame->selection()->rootEditableElement();
     RefPtr<EditingStyle> defaultStyle = EditingStyle::create(root);
 
     // We want to remove everything but transparent background.
     // FIXME: We shouldn't access style().
     defaultStyle->style()->setProperty(CSSPropertyBackgroundColor, CSSValueTransparent);
 
     applyCommandToComposite(ApplyStyleCommand::create(document(), defaultStyle.get(), isElementForRemoveFormatCommand, editingAction()));
 }
 
 }