Adding a type vector to replace type cells.

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index c7979cec3fa681cd09a0f1179007f8004d8227fe..dd22e2ce82f4065e424843fad4e4eb31d8aefb43 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -2660,8 +2660,7 @@ MaybeObject* Heap::AllocateTypeFeedbackInfo() {
     if (!maybe_info->To(&info)) return maybe_info;
   }
   info->initialize_storage();
-  info->set_type_feedback_cells(TypeFeedbackCells::cast(empty_fixed_array()),
-                                SKIP_WRITE_BARRIER);
+  info->set_feedback_vector(empty_fixed_array(), SKIP_WRITE_BARRIER);
   return info;
 }