Avoid leaking ThreadingPrimitives.h from StackStats.h when collection is off.

Source/core/rendering/svg/RenderSVGForeignObject.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) Research In Motion Limited 2010. 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 101 matching lines @@
 {
     // FIXME: Investigate in size rounding issues
     // FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
     // FIXME: Is this correct for vertical writing mode?
     computedValues.m_extent = static_cast<int>(roundf(m_viewport.height()));
     computedValues.m_position = logicalTop;
 }
 
 void RenderSVGForeignObject::layout()
 {
-    StackStats::LayoutCheckPoint layoutCheckPoint;
     ASSERT(needsLayout());
     ASSERT(!view()->layoutStateEnabled()); // RenderSVGRoot disables layoutState for the SVG rendering tree.
 
     LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this));
     SVGForeignObjectElement* foreign = static_cast<SVGForeignObjectElement*>(node());
 
     bool updateCachedBoundariesInParents = false;
     if (m_needsTransformUpdate) {
         m_localTransform = foreign->animatedLocalTransform();
         m_needsTransformUpdate = false;
@@ skipping 60 matching lines @@
 {
     SVGRenderSupport::mapLocalToContainer(this, repaintContainer, transformState, wasFixed);
 }
 
 const RenderObject* RenderSVGForeignObject::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
 {
     return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
 }
 
 }