Update more core classes to use OVERRIDE / FINAL when needed

Source/core/rendering/RenderTableCell.h

 /*
  * 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, 2007, 2009 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 138 matching lines @@
     virtual LayoutUnit paddingRight() const OVERRIDE;
 
     // FIXME: For now we just assume the cell has the same block flow direction as the table. It's likely we'll
     // create an extra anonymous RenderBlock to handle mixing directionality anyway, in which case we can lock
     // the block flow directionality of the cells to the table's directionality.
     virtual LayoutUnit paddingBefore() const OVERRIDE;
     virtual LayoutUnit paddingAfter() const OVERRIDE;
 
     void setOverrideLogicalContentHeightFromRowHeight(LayoutUnit);
 
-    virtual void scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged);
+    virtual void scrollbarsChanged(bool horizontalScrollbarChanged, bool verticalScrollbarChanged) OVERRIDE;
 
     bool cellWidthChanged() const { return m_cellWidthChanged; }
     void setCellWidthChanged(bool b = true) { m_cellWidthChanged = b; }
 
     static RenderTableCell* createAnonymous(Document*);
     static RenderTableCell* createAnonymousWithParentRenderer(const RenderObject*);
     virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject* parent) const OVERRIDE
     {
         return createAnonymousWithParentRenderer(parent);
     }
@@ skipping 116 matching lines @@
     unsigned m_hasRowSpan: 1;
     int m_intrinsicPaddingBefore;
     int m_intrinsicPaddingAfter;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableCell, isTableCell());
 
 } // namespace WebCore
 
 #endif // RenderTableCell_h