Moving the WhitenessWitness back to DescriptorArray.

src/transitions.h

 // Copyright 2012 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 93 matching lines @@
       Map* target,
       JSGlobalPropertyCell* descriptor_pointer,
       Object* back_pointer);
 
   // Copy the transition array, inserting a new transition.
   // TODO(verwaest): This should not cause an existing transition to be
   // overwritten.
   MUST_USE_RESULT MaybeObject* CopyInsert(String* name, Map* target);
 
   // Copy a single transition from the origin array.
-  inline void CopyFrom(TransitionArray* origin,
-                       int origin_transition,
-                       int target_transition,
-                       const WhitenessWitness& witness);
+  inline void NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
+                                                int origin_transition,
+                                                int target_transition);
 
   // Search a transition for a given property name.
   inline int Search(String* name);
 
   // Allocates a TransitionArray.
   MUST_USE_RESULT static MaybeObject* Allocate(
       int number_of_transitions,
       JSGlobalPropertyCell* descriptors_cell);
 
   // Casting.
@@ skipping 47 matching lines @@
            (transition_number * kTransitionSize) +
            kTransitionKey;
   }
 
   static int ToTargetIndex(int transition_number) {
     return kFirstIndex +
            (transition_number * kTransitionSize) +
            kTransitionTarget;
   }
 
-  inline void Set(int transition_number,
-                  String* key,
-                  Map* target,
-                  const WhitenessWitness&);
+  inline void NoIncrementalWriteBarrierSet(int transition_number,
+                                           String* key,
+                                           Map* target);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TRANSITIONS_H_