Make heap serialization nondestructive.

src/objects.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 812 matching lines @@
   // collection.  Only valid during a scavenge collection (specifically,
   // when all map words are heap object pointers, ie. not during a full GC).
   inline bool IsForwardingAddress();
 
   // Create a map word from a forwarding address.
   static inline MapWord FromForwardingAddress(HeapObject* object);
 
   // View this map word as a forwarding address.
   inline HeapObject* ToForwardingAddress();
 
-  // True if this map word is a serialization address.  This will only be the
-  // case during a destructive serialization of the heap.
-  inline bool IsSerializationAddress();
-
-  // Create a map word from a serialization address.
-  static inline MapWord FromSerializationAddress(int raw);
-
-  // View this map word as a serialization address.
-  inline int ToSerializationAddress();
-
   // Marking phase of full collection: the map word of live objects is
   // marked, and may be marked as overflowed (eg, the object is live, its
   // children have not been visited, and it does not fit in the marking
   // stack).
 
   // True if this map word's mark bit is set.
   inline bool IsMarked();
 
   // Return this map word but with its mark bit set.
   inline void SetMark();
@@ skipping 4031 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_