Pretenure prototype transitions array.

src/transitions-inl.h

Index: src/transitions-inl.h
diff --git a/src/transitions-inl.h b/src/transitions-inl.h
index 62c7a43b100da52a4906d2cb5d21994970e3b643..96d9495bf404cecb30760e01551bbd22a1fd7277 100644
--- a/src/transitions-inl.h
+++ b/src/transitions-inl.h
@@ -37,10 +37,9 @@ FixedArray* TransitionArray::GetPrototypeTransitions() {
 }
 
 
-void TransitionArray::SetPrototypeTransitions(FixedArray* transitions,
-                                              WriteBarrierMode mode) {
+void TransitionArray::SetPrototypeTransitions(FixedArray* transitions) {
   DCHECK(transitions->IsFixedArray());
-  set(kPrototypeTransitionsIndex, transitions, mode);
+  set(kPrototypeTransitionsIndex, transitions);
 }