Devirtualize PODArena and PODArena::Chunk's destructors

Source/platform/PODArena.h

 /*
  * Copyright (C) 2010 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 84 matching lines @@
         return new (allocateBase<T>()) T(argument1);
     }
 
     // The initial size of allocated chunks; increases as necessary to
     // satisfy large allocations. Mainly public for unit tests.
     enum {
         DefaultChunkSize = 16384
     };
 
 protected:
-    virtual ~PODArena() { }
     friend class WTF::RefCounted<PODArena>;
 
     PODArena()
         : m_allocator(FastMallocAllocator::create())
         , m_current(0)
         , m_currentChunkSize(DefaultChunkSize) { }
 
     explicit PODArena(PassRefPtr<Allocator> allocator)
         : m_allocator(allocator)
         , m_current(0)
@@ skipping 39 matching lines @@
         Chunk(Allocator* allocator, size_t size)
             : m_allocator(allocator)
             , m_size(size)
             , m_currentOffset(0)
         {
             m_base = static_cast<uint8_t*>(m_allocator->allocate(size));
         }
 
         // Frees the memory allocated from the Allocator in the
         // constructor.
-        virtual ~Chunk()
+        ~Chunk()
         {
             m_allocator->free(m_base);
         }
 
         // Returns a pointer to "size" bytes of storage, or 0 if this
         // Chunk could not satisfy the allocation.
         void* allocate(size_t size)
         {
             // Check for overflow
             if (m_currentOffset + size < m_currentOffset)
@@ skipping 16 matching lines @@
 
     RefPtr<Allocator> m_allocator;
     Chunk* m_current;
     size_t m_currentChunkSize;
     Vector<OwnPtr<Chunk> > m_chunks;
 };
 
 } // namespace WebCore
 
 #endif // PODArena_h