Remove StackStats.

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 1725 matching lines @@
         // View layout should not be re-entrant.
         ASSERT_NOT_REACHED();
         return;
     }
 
     if (Element* oe = ownerElement())
         oe->document()->updateLayout();
 
     updateStyleIfNeeded();
 
-    StackStats::LayoutCheckPoint layoutCheckPoint;
-
     // Only do a layout if changes have occurred that make it necessary.
     if (frameView && renderer() && (frameView->layoutPending() || renderer()->needsLayout()))
         frameView->layout();
 
     setNeedsFocusedElementCheck();
 }
 
 void Document::setNeedsFocusedElementCheck()
 {
     // FIXME: Using a Task doesn't look a good idea.
@@ skipping 3498 matching lines @@
 {
     return DocumentLifecycleNotifier::create(this);
 }
 
 DocumentLifecycleNotifier* Document::lifecycleNotifier()
 {
     return static_cast<DocumentLifecycleNotifier*>(ScriptExecutionContext::lifecycleNotifier());
 }
 
 } // namespace WebCore