Remove StackStats.

Source/core/rendering/RenderObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2782 matching lines @@
             if (RenderView* renderView = view()) {
                 if (FrameView* frameView = renderView->frameView())
                     frameView->scheduleRelayoutOfSubtree(this);
             }
         }
     }
 }
 
 void RenderObject::layout()
 {
-    StackStats::LayoutCheckPoint layoutCheckPoint;
     ASSERT(needsLayout());
     RenderObject* child = firstChild();
     while (child) {
         child->layoutIfNeeded();
         ASSERT(!child->needsLayout());
         child = child->nextSibling();
     }
     clearNeedsLayout();
 }
 
@@ skipping 518 matching lines @@
 {
     if (object1) {
         const WebCore::RenderObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showRenderTreeAndMark(object1, "*", object2, "-", 0);
     }
 }
 
 #endif