Correct handling of arrays with callbacks in the prototype chain.

src/transitions-inl.h

 // 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 44 matching lines @@
   ASSERT(object->IsTransitionArray());
   return reinterpret_cast<TransitionArray*>(object);
 }
 
 
 bool TransitionArray::HasElementsTransition() {
   return Search(GetHeap()->elements_transition_symbol()) != kNotFound;
 }
 
 
+bool TransitionArray::HasElementCallbacksTransition() {
+  return Search(GetHeap()->element_callbacks_symbol()) != kNotFound;
+}
+
+
 Object* TransitionArray::back_pointer_storage() {
   return get(kBackPointerStorageIndex);
 }
 
 
 void TransitionArray::set_back_pointer_storage(Object* back_pointer,
                                                WriteBarrierMode mode) {
   Heap* heap = GetHeap();
   WRITE_FIELD(this, kBackPointerStorageOffset, back_pointer);
   CONDITIONAL_WRITE_BARRIER(
@@ skipping 114 matching lines @@
 
 
 #undef FIELD_ADDR
 #undef WRITE_FIELD
 #undef CONDITIONAL_WRITE_BARRIER
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TRANSITIONS_INL_H_