Change LayoutState to be stack-allocated

Source/core/rendering/RenderMedia.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 44 matching lines @@
 
     RenderBox* controlsRenderer = toRenderBox(m_children.firstChild());
     if (!controlsRenderer)
         return;
 
     bool controlsNeedLayout = controlsRenderer->needsLayout();
     LayoutSize newSize = contentBoxRect().size();
     if (newSize == oldSize && !controlsNeedLayout)
         return;
 
-    LayoutStateMaintainer statePusher(*this, locationOffset());
+    LayoutState state(*this, locationOffset());
 
     controlsRenderer->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
     controlsRenderer->style()->setHeight(Length(newSize.height(), Fixed));
     controlsRenderer->style()->setWidth(Length(newSize.width(), Fixed));
     controlsRenderer->forceLayout();
     clearNeedsLayout();
 }
 
 void RenderMedia::paintReplaced(PaintInfo&, const LayoutPoint&)
 {
 }
 
 } // namespace WebCore