Have EditCommand classes deal with Document references, not pointers

Source/core/editing/SetSelectionCommand.cpp

 /*
  * Copyright (C) 2011 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 14 matching lines @@
 
 #include "config.h"
 #include "core/editing/SetSelectionCommand.h"
 
 #include "core/dom/Document.h"
 #include "core/page/Frame.h"
 
 namespace WebCore {
 
 SetSelectionCommand::SetSelectionCommand(const VisibleSelection& selection, FrameSelection::SetSelectionOptions options)
-    : SimpleEditCommand(&selection.base().anchorNode()->document())
+    : SimpleEditCommand(selection.base().anchorNode()->document())
     , m_options(options)
     , m_selectionToSet(selection)
 {
 }
 
 void SetSelectionCommand::doApply()
 {
-    FrameSelection* selection = document()->frame()->selection();
+    FrameSelection* selection = document().frame()->selection();
     ASSERT(selection);
 
     if (selection->shouldChangeSelection(m_selectionToSet) && m_selectionToSet.isNonOrphanedCaretOrRange()) {
         selection->setSelection(m_selectionToSet, m_options);
         setEndingSelection(m_selectionToSet);
     }
 }
 
 void SetSelectionCommand::doUnapply()
 {
-    FrameSelection* selection = document()->frame()->selection();
+    FrameSelection* selection = document().frame()->selection();
     ASSERT(selection);
 
     if (selection->shouldChangeSelection(startingSelection()) && startingSelection().isNonOrphanedCaretOrRange())
         selection->setSelection(startingSelection(), m_options);
 }
 
 } // namespace WebCore