Make array __proto__ manipulations not disturb the species protector

test/mjsunit/harmony/array-species-modified.js

Index: test/mjsunit/harmony/array-species-modified.js
diff --git a/test/mjsunit/harmony/array-species-modified.js b/test/mjsunit/harmony/array-species-modified.js
index b5c5c16d7bfeb3374a4be371e046516f86c7bf4b..73c52b91a49436d0f63fe3a422524fa7914db700 100644
--- a/test/mjsunit/harmony/array-species-modified.js
+++ b/test/mjsunit/harmony/array-species-modified.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-species
+// Flags: --harmony-species --allow-natives-syntax
 
 // Overwriting Array[Symbol.species] updates the protector
 
@@ -18,6 +18,7 @@ assertEquals(1, x.concat([1])[0]);
 class MyArray extends Array { }
 
 Object.defineProperty(Array, Symbol.species, {value: MyArray});
+assertFalse(%SpeciesProtector());
 
 assertEquals(MyArray, x.map(()=>{}).constructor);
 assertEquals(MyArray, x.filter(()=>{}).constructor);