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

Source/core/rendering/svg/RenderSVGResourceContainer.cpp

 /*
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 35 matching lines @@
 }
 
 RenderSVGResourceContainer::~RenderSVGResourceContainer()
 {
     if (m_registered)
         svgExtensionsFromNode(node())->removeResource(m_id);
 }
 
 void RenderSVGResourceContainer::layout()
 {
-    StackStats::LayoutCheckPoint layoutCheckPoint;
     // Invalidate all resources if our layout changed.
     if (everHadLayout() && selfNeedsLayout())
         RenderSVGRoot::addResourceForClientInvalidation(this);
 
     RenderSVGHiddenContainer::layout();
 }
 
 void RenderSVGResourceContainer::willBeDestroyed()
 {
     SVGResourcesCache::resourceDestroyed(this);
@@ skipping 151 matching lines @@
     if (!object->isSVGShape())
         return resourceTransform;
 
     SVGGraphicsElement* element = toSVGGraphicsElement(object->node());
     AffineTransform transform = element->getScreenCTM(SVGLocatable::DisallowStyleUpdate);
     transform *= resourceTransform;
     return transform;
 }
 
 }