Fix the last memory leak demonstrated by the test program in...

src/list.h

 // Copyright 2006-2009 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 33 matching lines @@
 
 // Forward defined as
 // template <typename T, class P = FreeStoreAllocationPolicy> class List;
 template <typename T, class P>
 class List {
  public:
 
   INLINE(explicit List(int capacity)) { Initialize(capacity); }
   INLINE(~List()) { DeleteData(data_); }
 
+  // Deallocates memory used by the list and leaves the list in a consistent
+  // empty state.
+  void Free() {
+    DeleteData(data_);
+    Initialize(0);
+  }
+
   INLINE(void* operator new(size_t size)) { return P::New(size); }
   INLINE(void operator delete(void* p, size_t)) { return P::Delete(p); }
 
   // Returns a reference to the element at index i.  This reference is
   // not safe to use after operations that can change the list's
   // backing store (eg, Add).
   inline T& operator[](int i) const  {
     ASSERT(0 <= i && i < length_);
     return data_[i];
   }
@@ skipping 75 matching lines @@
 
 // Add() is inlined, ResizeAdd() called by Add() is inlined except for
 // Lists of FrameElements, and ResizeAddInternal() is inlined in ResizeAdd().
 template <>
 void List<FrameElement,
           FreeStoreAllocationPolicy>::ResizeAdd(const FrameElement& element);
 
 } }  // namespace v8::internal
 
 #endif  // V8_LIST_H_