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

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1462 matching lines @@
     return change == Reattach;
 }
 
 Node::StyleChange Element::recalcOwnStyle(StyleChange change)
 {
     ASSERT(document().inStyleRecalc());
 
     CSSAnimationUpdateScope cssAnimationUpdateScope(this);
     RefPtr<RenderStyle> oldStyle = renderStyle();
     RefPtr<RenderStyle> newStyle = styleForRenderer();
-    StyleChange localChange = oldStyle ? Node::diff(oldStyle.get(), newStyle.get(), &document()) : Reattach;
+    StyleChange localChange = oldStyle ? Node::diff(oldStyle.get(), newStyle.get(), document()) : Reattach;
 
     if (localChange == Reattach) {
         AttachContext reattachContext;
         reattachContext.resolvedStyle = newStyle.get();
         reattach(reattachContext);
         return Reattach;
     }
 
     InspectorInstrumentation::didRecalculateStyleForElement(this);
 
@@ skipping 2140 matching lines @@
     return 0;
 }
 
 Attribute* UniqueElementData::attributeItem(unsigned index)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < length());
     return &m_attributeVector.at(index);
 }
 
 } // namespace WebCore