Remove elements transitions from the transition array.

src/transitions.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 32 matching lines @@
   MaybeObject* maybe_array = heap->AllocateFixedArray(length);
   if (!maybe_array->To(&array)) return maybe_array;
   return array;
 }
 
 
 MaybeObject* TransitionArray::Allocate(int number_of_transitions) {
   FixedArray* array;
   MaybeObject* maybe_array = AllocateRaw(ToKeyIndex(number_of_transitions));
   if (!maybe_array->To(&array)) return maybe_array;
-  array->set(kElementsTransitionIndex, Smi::FromInt(0));
   array->set(kPrototypeTransitionsIndex, Smi::FromInt(0));
   return array;
 }
 
 
 void TransitionArray::NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
                                                         int origin_transition,
                                                         int target_transition) {
   NoIncrementalWriteBarrierSet(target_transition,
                                origin->GetKey(origin_transition),
@@ skipping 49 matching lines @@
   int number_of_transitions = this->number_of_transitions();
   int new_size = number_of_transitions;
 
   int insertion_index = this->Search(name);
   if (insertion_index == kNotFound) ++new_size;
 
   MaybeObject* maybe_array;
   maybe_array = TransitionArray::Allocate(new_size);
   if (!maybe_array->To(&result)) return maybe_array;
 
-  if (HasElementsTransition()) {
-    result->set_elements_transition(elements_transition());
-  }
-
   if (HasPrototypeTransitions()) {
     result->SetPrototypeTransitions(GetPrototypeTransitions());
   }
 
   if (insertion_index != kNotFound) {
     for (int i = 0; i < number_of_transitions; ++i) {
       if (i != insertion_index) {
         result->NoIncrementalWriteBarrierCopyFrom(this, i, i);
       }
     }
@@ skipping 15 matching lines @@
     result->NoIncrementalWriteBarrierCopyFrom(
         this, insertion_index, insertion_index + 1);
   }
 
   result->set_back_pointer_storage(back_pointer_storage());
   return result;
 }
 
 
 } }  // namespace v8::internal