Have EditCommand classes deal with Document references, not pointers

Source/core/editing/FormatBlockCommand.cpp

 /*
  * Copyright (C) 2006 Apple Computer, 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 26 matching lines @@
 
 using namespace HTMLNames;
 
 static Node* enclosingBlockToSplitTreeTo(Node* startNode);
 static bool isElementForFormatBlock(const QualifiedName& tagName);
 static inline bool isElementForFormatBlock(Node* node)
 {
     return node->isElementNode() && isElementForFormatBlock(toElement(node)->tagQName());
 }
 
-FormatBlockCommand::FormatBlockCommand(Document* document, const QualifiedName& tagName)
+FormatBlockCommand::FormatBlockCommand(Document& document, const QualifiedName& tagName)
     : ApplyBlockElementCommand(document, tagName)
     , m_didApply(false)
 {
 }
 
 void FormatBlockCommand::formatSelection(const VisiblePosition& startOfSelection, const VisiblePosition& endOfSelection)
 {
     if (!isElementForFormatBlock(tagName()))
         return;
     ApplyBlockElementCommand::formatSelection(startOfSelection, endOfSelection);
     m_didApply = true;
 }
 
 void FormatBlockCommand::formatRange(const Position& start, const Position& end, const Position& endOfSelection, RefPtr<Element>& blockNode)
 {
     Node* nodeToSplitTo = enclosingBlockToSplitTreeTo(start.deprecatedNode());
     RefPtr<Node> outerBlock = (start.deprecatedNode() == nodeToSplitTo) ? start.deprecatedNode() : splitTreeToNode(start.deprecatedNode(), nodeToSplitTo);
     RefPtr<Node> nodeAfterInsertionPosition = outerBlock;
 
-    RefPtr<Range> range = Range::create(document(), start, endOfSelection);
+    RefPtr<Range> range = Range::create(&document(), start, endOfSelection);
     Element* refNode = enclosingBlockFlowElement(end);
     Element* root = editableRootForPosition(start);
     // Root is null for elements with contenteditable=false.
     if (!root || !refNode)
         return;
     if (isElementForFormatBlock(refNode->tagQName()) && start == startOfBlock(start)
         && (end == endOfBlock(end) || isNodeVisiblyContainedWithin(refNode, range.get()))
         && refNode != root && !root->isDescendantOf(refNode)) {
         // Already in a block element that only contains the current paragraph
         if (refNode->hasTagName(tagName()))
@@ skipping 76 matching lines @@
             return n;
         if (isBlock(n))
             lastBlock = n;
         if (isListElement(n))
             return n->parentNode()->rendererIsEditable() ? n->parentNode() : n;
     }
     return lastBlock;
 }
 
 }