Possible fix for a Mac performance regression.

Source/wtf/Deque.h

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 307 matching lines @@
             TypeOperations::destruct(m_buffer.buffer() + m_start, m_buffer.buffer() + m_buffer.capacity());
         }
     }
 
     template<typename T, size_t inlineCapacity>
     inline Deque<T, inlineCapacity>::~Deque()
     {
         checkValidity();
         invalidateIterators();
         destroyAll();
+        m_buffer.destruct();
     }
 
     template<typename T, size_t inlineCapacity>
     inline void Deque<T, inlineCapacity>::swap(Deque<T, inlineCapacity>& other)
     {
         checkValidity();
         other.checkValidity();
         invalidateIterators();
         std::swap(m_start, other.m_start);
         std::swap(m_end, other.m_end);
@@ skipping 301 matching lines @@
         if (!m_index)
             return &m_deque->m_buffer.buffer()[m_deque->m_buffer.capacity() - 1];
         return &m_deque->m_buffer.buffer()[m_index - 1];
     }
 
 } // namespace WTF
 
 using WTF::Deque;
 
 #endif // WTF_Deque_h