Ensure proper finalization of garbage-collected types.

Source/heap/Heap.h

 /*
  * Copyright (C) 2013 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 858 matching lines @@
     void operator delete(void* p)
     {
         ASSERT_NOT_REACHED();
     }
 
 protected:
     GarbageCollected()
     {
         ASSERT(ThreadStateFor<ThreadingTrait<T>::Affinity>::state()->contains(reinterpret_cast<Address>(this)));
     }
-    ~GarbageCollected() { }
 };
 
 // Base class for objects allocated in the Blink garbage-collected
 // heap.
 //
 // Defines a 'new' operator that allocates the memory in the
 // heap. 'delete' should not be called on objects that inherit from
 // GarbageCollected.
 //
 // Instances of GarbageCollectedFinalized will have their destructor
@@ skipping 800 matching lines @@
 // to export. This forces it to export all the methods from ThreadHeap.
 template<> void ThreadHeap<FinalizedHeapObjectHeader>::addPageToHeap(const GCInfo*);
 template<> void ThreadHeap<HeapObjectHeader>::addPageToHeap(const GCInfo*);
 extern template class HEAP_EXPORT ThreadHeap<FinalizedHeapObjectHeader>;
 extern template class HEAP_EXPORT ThreadHeap<HeapObjectHeader>;
 #endif
 
 }
 
 #endif // Heap_h