Move DescriptorArray into the map

src/transitions.cc

Index: src/transitions.cc
diff --git a/src/transitions.cc b/src/transitions.cc
index a65f3c3b2a8aaf7baa9371ecbe84bf4cf423480b..56b6caf3db0a433e60c6850b41b73afbf6b6c080 100644
--- a/src/transitions.cc
+++ b/src/transitions.cc
@@ -73,7 +73,6 @@ static bool InsertionPointFound(String* key1, String* key2) {
 MaybeObject* TransitionArray::NewWith(SimpleTransitionFlag flag,
                                       String* key,
                                       Map* target,
-                                      DescriptorArray* descriptors,
                                       Object* back_pointer) {
   TransitionArray* result;
   MaybeObject* maybe_result;
@@ -88,16 +87,10 @@ MaybeObject* TransitionArray::NewWith(SimpleTransitionFlag flag,
     result->NoIncrementalWriteBarrierSet(0, key, target);
   }
   result->set_back_pointer_storage(back_pointer);
-  result->set_descriptors(descriptors);
   return result;
 }
 
 
-MaybeObject* TransitionArray::AllocateDescriptorsHolder() {
-  return AllocateRaw(kDescriptorsHolderSize);
-}
-
-
 MaybeObject* TransitionArray::ExtendToFullTransitionArray() {
   ASSERT(!IsFullTransitionArray());
   int nof = number_of_transitions();
@@ -109,7 +102,6 @@ MaybeObject* TransitionArray::ExtendToFullTransitionArray() {
     result->NoIncrementalWriteBarrierCopyFrom(this, kSimpleTransitionIndex, 0);
   }
 
-  result->set_descriptors(descriptors());
   result->set_back_pointer_storage(back_pointer_storage());
   return result;
 }
@@ -128,8 +120,6 @@ MaybeObject* TransitionArray::CopyInsert(String* name, Map* target) {
   maybe_array = TransitionArray::Allocate(new_size);
   if (!maybe_array->To(&result)) return maybe_array;
 
-  result->set_descriptors(descriptors());
-
   if (HasElementsTransition()) {
     result->set_elements_transition(elements_transition());
   }