Use shared container to manage imports/exports.

src/collection-iterator.js

 // Copyright 2014 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.
 
 var $mapEntries;
 var $mapIteratorNext;
 var $setIteratorNext;
 var $setValues;
 
-(function(global, shared, exports) {
+(function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 var GlobalMap = global.Map;
 var GlobalSet = global.Set;
 
 // -------------------------------------------------------------------
 
@@ skipping 144 matching lines @@
   'keys', MapKeys,
   'values', MapValues
 ]);
 
 %AddNamedProperty(GlobalMap.prototype, symbolIterator, MapEntries, DONT_ENUM);
 
 $mapEntries = MapEntries;
 $mapIteratorNext = MapIteratorNextJS;
 
 })