Transition array should not know about write barrier internals.

src/transitions.h

Index: src/transitions.h
diff --git a/src/transitions.h b/src/transitions.h
index fc89c34719131aac70077cc60bddee59aea4557e..2715a48b62ca3406238b3c3798257d12d3b52ad0 100644
--- a/src/transitions.h
+++ b/src/transitions.h
@@ -297,9 +297,7 @@ class TransitionArray: public FixedArray {
                                    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,