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

Source/core/layout/OrderIterator.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef OrderIterator_h
 #define OrderIterator_h
 
+#include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 
 #include <set>
 
 namespace blink {
 
 class LayoutBox;
 
 class OrderIterator {
+    DISALLOW_ALLOCATION();
     WTF_MAKE_NONCOPYABLE(OrderIterator);
 public:
     friend class OrderIteratorPopulator;
 
     OrderIterator(const LayoutBox*);
 
     LayoutBox* currentChild() const { return m_currentChild; }
     LayoutBox* first();
     LayoutBox* next();
     void reset();
 
 private:
     const LayoutBox* m_containerBox;
 
     LayoutBox* m_currentChild;
 
     typedef std::set<int> OrderValues;
     OrderValues m_orderValues;
     OrderValues::const_iterator m_orderValuesIterator;
     bool m_isReset;
 };
 
 class OrderIteratorPopulator {
+    STACK_ALLOCATED();
 public:
     explicit OrderIteratorPopulator(OrderIterator& iterator)
         : m_iterator(iterator)
     {
         m_iterator.m_orderValues.clear();
     }
 
     ~OrderIteratorPopulator();
 
     void collectChild(const LayoutBox*);
 
 private:
     OrderIterator& m_iterator;
 };
 
 } // namespace blink
 
 #endif //  OrderIterator_h