Transition array should not know about write barrier internals.

src/transitions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_TRANSITIONS_H_
 #define V8_TRANSITIONS_H_
 
 #include "src/checks.h"
 #include "src/elements-kind.h"
 #include "src/heap/heap.h"
@@ skipping 279 matching lines @@
   static inline int CompareNames(Name* key1, uint32_t hash1, Name* key2,
                                  uint32_t hash2);
 
   // Compares two details, returns -1 if details1 is "less" than details2,
   // 0 if details1 equal to details2 and 1 otherwise.
   static inline int CompareDetails(PropertyKind kind1,
                                    PropertyAttributes attributes1,
                                    PropertyKind kind2,
                                    PropertyAttributes attributes2);
 
-  inline void NoIncrementalWriteBarrierSet(int transition_number,
-                                           Name* key,
-                                           Map* target);
+  inline void Set(int transition_number, Name* key, Map* target);
 
   // Copy a single transition from the origin array.
   inline void NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
                                                 int origin_transition,
                                                 int target_transition);
 
 #ifdef DEBUG
   static void CheckNewTransitionsAreConsistent(Handle<Map> map,
                                                TransitionArray* old_transitions,
                                                Object* transitions);
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TRANSITIONS_H_