Make array __proto__ manipulations not disturb the species protector

test/mjsunit/harmony/array-species-parent-constructor.js

Index: test/mjsunit/harmony/array-species-parent-constructor.js
diff --git a/test/mjsunit/harmony/array-species-parent-constructor.js b/test/mjsunit/harmony/array-species-parent-constructor.js
index 8ea59bcfe453c2a7cf212e7ed0129a3d9b1c2b34..cb0446f2374c1d717e2c33cc3b61e13a45945667 100644
--- a/test/mjsunit/harmony/array-species-parent-constructor.js
+++ b/test/mjsunit/harmony/array-species-parent-constructor.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.prototype.constructor updates the protector
 
@@ -18,6 +18,7 @@ assertEquals(1, x.concat([1])[0]);
 class MyArray extends Array { }
 
 Array.prototype.constructor = MyArray;
+assertEquals(0, %SpeciesProtector());
 
 assertEquals(MyArray, x.map(()=>{}).constructor);
 assertEquals(MyArray, x.filter(()=>{}).constructor);