Tenure transition array.

src/transitions.cc

Index: src/transitions.cc
diff --git a/src/transitions.cc b/src/transitions.cc
index 0d1b7d65c02c2d3af29f0d1093d276616c150f69..85e5dc7967dccc65235a6b6e274489498eed2e2e 100644
--- a/src/transitions.cc
+++ b/src/transitions.cc
@@ -392,7 +392,7 @@ Handle<TransitionArray> TransitionArray::Allocate(Isolate* isolate,
                                                   int number_of_transitions,
                                                   int slack) {
   Handle<FixedArray> array = isolate->factory()->NewFixedArray(
-      LengthFor(number_of_transitions + slack));
+      LengthFor(number_of_transitions + slack), TENURED);
   array->set(kPrototypeTransitionsIndex, Smi::FromInt(0));
   array->set(kTransitionLengthIndex, Smi::FromInt(number_of_transitions));
   return Handle<TransitionArray>::cast(array);