Have Node::diff() take a Document reference in argument

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 6564 matching lines @@
     return 0;
 }
 
 void RenderBlock::updateFirstLetterStyle(RenderObject* firstLetterBlock, RenderObject* currentChild)
 {
     RenderObject* firstLetter = currentChild->parent();
     RenderObject* firstLetterContainer = firstLetter->parent();
     RenderStyle* pseudoStyle = styleForFirstLetter(firstLetterBlock, firstLetterContainer);
     ASSERT(firstLetter->isFloating() || firstLetter->isInline());
 
-    if (Node::diff(firstLetter->style(), pseudoStyle, &document()) == Node::Reattach) {
+    if (Node::diff(firstLetter->style(), pseudoStyle, document()) == Node::Reattach) {
         // The first-letter renderer needs to be replaced. Create a new renderer of the right type.
         RenderObject* newFirstLetter;
         if (pseudoStyle->display() == INLINE)
             newFirstLetter = RenderInline::createAnonymous(&document());
         else
             newFirstLetter = RenderBlock::createAnonymous(&document());
         newFirstLetter->setStyle(pseudoStyle);
 
         // Move the first letter into the new renderer.
         LayoutStateDisabler layoutStateDisabler(view());
@@ skipping 1442 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace WebCore