Split SetProperty(...attributes, strictmode) into AddProperty(...attributes) and SetProperty(...…

src/array-iterator.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Array = global.Array;
@@ skipping 92 matching lines @@
 function SetUpArrayIterator() {
   %CheckIsBootstrapping();
 
   %FunctionSetPrototype(ArrayIterator, new $Object());
   %FunctionSetInstanceClassName(ArrayIterator, 'Array Iterator');
 
   InstallFunctions(ArrayIterator.prototype, DONT_ENUM, $Array(
     'next', ArrayIteratorNext
   ));
   %FunctionSetName(ArrayIteratorIterator, '[Symbol.iterator]');
-  %SetProperty(ArrayIterator.prototype, symbolIterator, ArrayIteratorIterator,
-      DONT_ENUM | DONT_DELETE | READ_ONLY);
+  %AddProperty(ArrayIterator.prototype, symbolIterator,
+      ArrayIteratorIterator, DONT_ENUM | DONT_DELETE | READ_ONLY);
 }
 SetUpArrayIterator();
 
 
 function ExtendArrayPrototype() {
   %CheckIsBootstrapping();
 
   InstallFunctions($Array.prototype, DONT_ENUM, $Array(
     'entries', ArrayEntries,
     'values', ArrayValues,
     'keys', ArrayKeys
   ));
 }
 ExtendArrayPrototype();