Hide synthetic metadata field exposed in r35926.

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
diff --git a/runtime/vm/object_test.cc b/runtime/vm/object_test.cc
index 53bdb2f79fa7b6d9517380578ffc73c3700d8bbb..5ccc8d4c847e27504cba05b936e9a60f8a8f87ec 100644
--- a/runtime/vm/object_test.cc
+++ b/runtime/vm/object_test.cc
@@ -252,7 +252,7 @@ TEST_CASE(InstanceClass) {
   const Array& one_fields = Array::Handle(Array::New(1));
   const String& field_name = String::Handle(Symbols::New("the_field"));
   const Field& field = Field::Handle(
-       Field::New(field_name, false, false, false, one_field_class, 0));
+      Field::New(field_name, false, false, false, false, one_field_class, 0));
   one_fields.SetAt(0, field);
   one_field_class.SetFields(one_fields);
   one_field_class.Finalize();
@@ -2741,7 +2741,7 @@ static RawField* CreateTestField(const char* name) {
   const Class& cls = Class::Handle(CreateTestClass("global:"));
   const String& field_name = String::Handle(Symbols::New(name));
   const Field& field =
-      Field::Handle(Field::New(field_name, true, false, false, cls, 0));
+      Field::Handle(Field::New(field_name, true, false, false, false, cls, 0));
   return field.raw();
 }