Move rendering/RenderObject to layout/LayoutObject.

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 160 matching lines @@
     setIntegralAttribute(rowspanAttr, n);
 }
 
 const AtomicString& HTMLTableCellElement::scope() const
 {
     return fastGetAttribute(scopeAttr);
 }
 
 HTMLTableCellElement* HTMLTableCellElement::cellAbove() const
 {
-    RenderObject* cellRenderer = renderer();
+    LayoutObject* cellRenderer = renderer();
     if (!cellRenderer)
         return nullptr;
     if (!cellRenderer->isTableCell())
         return nullptr;
 
     LayoutTableCell* tableCellRenderer = toLayoutTableCell(cellRenderer);
     LayoutTableCell* cellAboveRenderer = tableCellRenderer->table()->cellAbove(tableCellRenderer);
     if (!cellAboveRenderer)
         return nullptr;
 
     return toHTMLTableCellElement(cellAboveRenderer->node());
 }
 
 } // namespace blink