Make array __proto__ manipulations not disturb the species protector

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

Index: test/mjsunit/harmony/array-species-constructor-accessor.js
diff --git a/test/mjsunit/harmony/array-species-constructor-accessor.js b/test/mjsunit/harmony/array-species-constructor-accessor.js
index 5985e5308b9d70d6f80137f3ff84a5f315a71d3c..4c852f06f0009405b02cc7dbb5ea0c1601737f9b 100644
--- a/test/mjsunit/harmony/array-species-constructor-accessor.js
+++ b/test/mjsunit/harmony/array-species-constructor-accessor.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 the constructor of an instance updates the protector
 
@@ -18,6 +18,7 @@ assertEquals(1, x.concat([1])[0]);
 class MyArray extends Array { }
 
 Object.defineProperty(x, 'constructor', {get() { return MyArray; }});
+assertFalse(%SpeciesProtector());
 
 assertEquals(MyArray, x.map(()=>{}).constructor);
 assertEquals(MyArray, x.filter(()=>{}).constructor);