Change LayoutState to be stack-allocated

Source/core/rendering/RenderTable.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, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 407 matching lines @@
     LayoutRepainter repainter(*this, checkForPaintInvalidationDuringLayout());
     SubtreeLayoutScope layouter(*this);
 
 
     // If any table section moved vertically, we will just repaint everything from that
     // section down (it is quite unlikely that any of the following sections
     // did not shift).
     bool sectionMoved = false;
     LayoutUnit movedSectionLogicalTop = 0;
     {
-        LayoutStateMaintainer statePusher(*this, locationOffset());
+        LayoutState state(*this, locationOffset());
 
         setLogicalHeight(0);
 
         LayoutUnit oldLogicalWidth = logicalWidth();
         updateLogicalWidth();
 
         if (logicalWidth() != oldLogicalWidth) {
             for (unsigned i = 0; i < m_captions.size(); i++)
                 layouter.setNeedsLayout(m_captions[i]);
         }
@@ skipping 1004 matching lines @@
 const BorderValue& RenderTable::tableEndBorderAdjoiningCell(const RenderTableCell* cell) const
 {
     ASSERT(cell->isFirstOrLastCellInRow());
     if (hasSameDirectionAs(cell->row()))
         return style()->borderEnd();
 
     return style()->borderStart();
 }
 
 }