Add a test to verify correctness of remembered set update for Heap::CopyJSObject.

src/heap.h

 // Copyright 2006-2008 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 920 matching lines @@
   };
 
   static Object* NumberToString(Object* number);
 
   static Map* MapForExternalArrayType(ExternalArrayType array_type);
   static RootListIndex RootIndexForExternalArrayType(
       ExternalArrayType array_type);
 
   static void RecordStats(HeapStats* stats);
 
+  static int MaxObjectSizeInNewSpace() { return kMaxObjectSizeInNewSpace; }
+
  private:
   static int reserved_semispace_size_;
   static int max_semispace_size_;
   static int initial_semispace_size_;
   static int max_old_generation_size_;
   static size_t code_range_size_;
 
   // For keeping track of how much data has survived
   // scavenge since last new space expansion.
   static int survived_since_last_expansion_;
@@ skipping 847 matching lines @@
 
   // To speed up scavenge collections new space string are kept
   // separate from old space strings.
   static List<Object*> new_space_strings_;
   static List<Object*> old_space_strings_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_