Use import/export for more functions (instead of js builtins object).

src/js/collection.js

 // Copyright 2012 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 $getHash;
-var $getExistingHash;
-
 (function(global, utils) {
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalMap = global.Map;
 var GlobalObject = global.Object;
@@ skipping 437 matching lines @@
 utils.InstallGetter(GlobalMap.prototype, "size", MapGetSize);
 utils.InstallFunctions(GlobalMap.prototype, DONT_ENUM, [
   "get", MapGet,
   "set", MapSet,
   "has", MapHas,
   "delete", MapDelete,
   "clear", MapClearJS,
   "forEach", MapForEach
 ]);
 
-// Expose to the global scope.
-$getHash = GetHash;
-$getExistingHash = GetExistingHash;
-
 function MapFromArray(array) {
   var map = new GlobalMap;
   var length = array.length;
   for (var i = 0; i < length; i += 2) {
     var key = array[i];
     var value = array[i + 1];
     %_Call(MapSet, map, key, value);
   }
   return map;
 };
@@ skipping 15 matching lines @@
   "map_set", MapSet,
   "map_has", MapHas,
   "map_delete", MapDelete,
   "set_add", SetAdd,
   "set_has", SetHas,
   "set_delete", SetDelete,
   "map_from_array", MapFromArray,
   "set_from_array",SetFromArray,
 ]);
 
+utils.Export(function(to) {
+  to.GetExistingHash = GetExistingHash;
+  to.GetHash = GetHash;
+});
+
 })