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

Source/core/rendering/svg/RenderSVGShape.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  * Copyright (C) 2011 University of Szeged
@@ skipping 121 matching lines @@
 
     StyleColor fallbackColor;
     if (requiresStroke && !RenderSVGResource::strokePaintingResource(this, style(), fallbackColor))
         return false;
 
     return shapeDependentStrokeContains(point);
 }
 
 void RenderSVGShape::layout()
 {
-    StackStats::LayoutCheckPoint layoutCheckPoint;
     LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) && selfNeedsLayout());
     SVGGraphicsElement* element = toSVGGraphicsElement(node());
 
     bool updateCachedBoundariesInParents = false;
 
     if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
         updateShapeFromElement();
         m_needsShapeUpdate = false;
         updateRepaintBoundingBox();
         m_needsBoundariesUpdate = false;
@@ skipping 306 matching lines @@
         return;
 
     ASSERT(m_path);
 
     SVGMarkerData markerData(m_markerPositions);
     m_path->apply(&markerData, SVGMarkerData::updateFromPathElement);
     markerData.pathIsDone();
 }
 
 }