Change LayoutState to be stack-allocated

Source/core/rendering/RenderTableRow.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.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 143 matching lines @@
 
     if (beforeChild || nextRow())
         section()->setNeedsCellRecalc();
 }
 
 void RenderTableRow::layout()
 {
     ASSERT(needsLayout());
 
     // Table rows do not add translation.
-    LayoutStateMaintainer statePusher(*this, LayoutSize());
+    LayoutState state(*this, LayoutSize());
 
     for (RenderTableCell* cell = firstCell(); cell; cell = cell->nextCell()) {
         SubtreeLayoutScope layouter(*cell);
         if (!cell->needsLayout())
             cell->markForPaginationRelayoutIfNeeded(layouter);
         if (cell->needsLayout()) {
             cell->computeAndSetBlockDirectionMargins(table());
             cell->layout();
         }
     }
@@ skipping 81 matching lines @@
 
 RenderTableRow* RenderTableRow::createAnonymousWithParentRenderer(const RenderObject* parent)
 {
     RenderTableRow* newRow = RenderTableRow::createAnonymous(&parent->document());
     RefPtr<RenderStyle> newStyle = RenderStyle::createAnonymousStyleWithDisplay(parent->style(), TABLE_ROW);
     newRow->setStyle(newStyle.release());
     return newRow;
 }
 
 } // namespace WebCore