Use function wrapper argument to expose internal arrays to native scripts.

src/templates.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.
 
 // Called from a desugaring in the parser.
 
 var $getTemplateCallSite;
 
 (function(global, shared, exports) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
-var callSiteCache = new global.Map;
-var mapGetFn = global.Map.prototype.get;
-var mapSetFn = global.Map.prototype.set;
+// -------------------------------------------------------------------
+// Imports
+
+var GlobalMap = global.Map;
+var InternalArray = shared.InternalArray;
+
+// -------------------------------------------------------------------
+
+var callSiteCache = new GlobalMap;
+var mapGetFn = GlobalMap.prototype.get;
+var mapSetFn = GlobalMap.prototype.set;
 
 
 function SameCallSiteElements(rawStrings, other) {
   var length = rawStrings.length;
   var other = other.raw;
 
   if (length !== other.length) return false;
 
   for (var i = 0; i < length; ++i) {
     if (rawStrings[i] !== other[i]) return false;
@@ skipping 36 matching lines @@
 
   if (!IS_UNDEFINED(cached)) return cached;
 
   %AddNamedProperty(siteObj, "raw", %ObjectFreeze(rawStrings),
       READ_ONLY | DONT_ENUM | DONT_DELETE);
 
   return SetCachedCallSite(%ObjectFreeze(siteObj), hash);
 }
 
 })