Transition array should not know about write barrier internals.

src/transitions-inl.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_INL_H_
 #define V8_TRANSITIONS_INL_H_
 
 #include "src/transitions.h"
 
 namespace v8 {
@@ skipping 140 matching lines @@
 PropertyDetails TransitionArray::GetTargetDetails(Name* name, Map* target) {
   DCHECK(!IsSpecialTransition(name));
   int descriptor = target->LastAdded();
   DescriptorArray* descriptors = target->instance_descriptors();
   // Transitions are allowed only for the last added property.
   DCHECK(descriptors->GetKey(descriptor)->Equals(name));
   return descriptors->GetDetails(descriptor);
 }
 
 
-void TransitionArray::NoIncrementalWriteBarrierSet(int transition_number,
-                                                   Name* key,
-                                                   Map* target) {
-  FixedArray::NoIncrementalWriteBarrierSet(
-      this, ToKeyIndex(transition_number), key);
-  FixedArray::NoIncrementalWriteBarrierSet(
-      this, ToTargetIndex(transition_number), target);
+void TransitionArray::Set(int transition_number, Name* key, Map* target) {
+  set(ToKeyIndex(transition_number), key);
+  set(ToTargetIndex(transition_number), target);
 }
 
 
 void TransitionArray::SetNumberOfTransitions(int number_of_transitions) {
   DCHECK(number_of_transitions <= Capacity(this));
   set(kTransitionLengthIndex, Smi::FromInt(number_of_transitions));
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TRANSITIONS_INL_H_