Have EditCommand classes deal with Document references, not pointers

Source/core/editing/TextInsertionBaseCommand.cpp

 /*
  * Copyright (C) 2012 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 "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/BeforeTextInsertedEvent.h"
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/editing/FrameSelection.h"
 #include "core/page/Frame.h"
 
 namespace WebCore {
 
-TextInsertionBaseCommand::TextInsertionBaseCommand(Document* document)
+TextInsertionBaseCommand::TextInsertionBaseCommand(Document& document)
     : CompositeEditCommand(document)
 {
 }
 
 void TextInsertionBaseCommand::applyTextInsertionCommand(Frame* frame, PassRefPtr<TextInsertionBaseCommand> command, const VisibleSelection& selectionForInsertion, const VisibleSelection& endingSelection)
 {
     bool changeSelection = selectionForInsertion != endingSelection;
     if (changeSelection) {
         command->setStartingSelection(selectionForInsertion);
         command->setEndingSelection(selectionForInsertion);
@@ skipping 27 matching lines @@
     Node* node = selection.rootEditableElement();
     if (!node)
         return false;
 
     RefPtr<BeforeTextInsertedEvent> event = BeforeTextInsertedEvent::create(String("\n"));
     node->dispatchEvent(event, IGNORE_EXCEPTION);
     return event->text().length();
 }
 
 }