Remove leftover NoIncrementalWriteBarrier prototypes.

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 281 matching lines @@
 
   // 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 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_