Mark CheckMaps that can cause migration with ChangesNewSpacePromotion.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index ce3816e865bf06fdf19c59d0c2180a6f2f503379..01ec295b24e21f7237bfaa35f5b76f654c734bbd 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -2852,7 +2852,7 @@ HCheckMaps* HCheckMaps::New(Zone* zone,
                             HValue* typecheck) {
   HCheckMaps* check_map = new(zone) HCheckMaps(value, zone, typecheck);
   check_map->map_set_.Add(map, zone);
-  check_map->has_migration_target_ = map->is_migration_target();
+  if (map->is_migration_target()) check_map->MarkMigrationTarget();
   if (map->CanOmitMapChecks() &&
       value->IsConstant() &&
       HConstant::cast(value)->InstanceOf(map)) {