Make classes and structures in core/layout fast-allocated.

Source/core/layout/svg/SVGResourcesCycleSolver.h

 /*
  * 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGResourcesCycleSolver_h
 #define SVGResourcesCycleSolver_h
 
+#include "wtf/Allocator.h"
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 
 class LayoutObject;
 class LayoutSVGResourceContainer;
 class SVGResources;
 
 class SVGResourcesCycleSolver {
+    STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(SVGResourcesCycleSolver);
 public:
     SVGResourcesCycleSolver(LayoutObject*, SVGResources*);
     ~SVGResourcesCycleSolver();
 
     void resolveCycles();
 
     typedef HashSet<LayoutSVGResourceContainer*> ResourceSet;
 
 private:
     bool resourceContainsCycles(LayoutSVGResourceContainer*);
     void breakCycle(LayoutSVGResourceContainer*);
 
     LayoutObject* m_layoutObject;
     SVGResources* m_resources;
 
     ResourceSet m_activeResources;
     ResourceSet m_dagCache;
 };
 
 }
 
 #endif