Install iterator meta objects via utils object.

src/js/iterator-prototype.js

Index: src/js/iterator-prototype.js
diff --git a/src/js/iterator-prototype.js b/src/js/iterator-prototype.js
index 2f49d90b1c97baa9fd39723f5e559e426843bc07..6f2501979d07c03e4787494fcbfcd53f21947b05 100644
--- a/src/js/iterator-prototype.js
+++ b/src/js/iterator-prototype.js
@@ -2,13 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-var $iteratorPrototype;
-
 (function(global, utils) {
   "use strict";
   %CheckIsBootstrapping();
 
   var GlobalObject = global.Object;
+  var IteratorPrototype = utils.ImportNow("IteratorPrototype");
   var iteratorSymbol = utils.ImportNow("iterator_symbol");
 
   // 25.1.2.1 %IteratorPrototype% [ @@iterator ] ( )
@@ -17,6 +16,6 @@ var $iteratorPrototype;
   }
 
   utils.SetFunctionName(IteratorPrototypeIterator, iteratorSymbol);
-  %AddNamedProperty($iteratorPrototype, iteratorSymbol,
+  %AddNamedProperty(IteratorPrototype, iteratorSymbol,
       IteratorPrototypeIterator, DONT_ENUM);
 })