Remove StyleEngine.h include from RenderObject.h

Source/core/html/HTMLTableCellElement.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. 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
@@ skipping 11 matching lines @@
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/html/HTMLTableCellElement.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/CSSValueKeywords.h"
 #include "core/HTMLNames.h"
 #include "core/dom/Attribute.h"
+#include "core/dom/ElementTraversal.h"
 #include "core/html/HTMLTableElement.h"
 #include "core/rendering/RenderTableCell.h"
 
 using std::max;
 using std::min;
 
 namespace WebCore {
 
 // Clamp rowspan at 8k to match Firefox.
 static const int maxRowspan = 8190;
@@ skipping 133 matching lines @@
 
     RenderTableCell* tableCellRenderer = toRenderTableCell(cellRenderer);
     RenderTableCell* cellAboveRenderer = tableCellRenderer->table()->cellAbove(tableCellRenderer);
     if (!cellAboveRenderer)
         return 0;
 
     return toHTMLTableCellElement(cellAboveRenderer->node());
 }
 
 } // namespace WebCore