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

src/object-observe.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 $observeNotifyChange;
 var $observeEnqueueSpliceRecord;
 var $observeBeginPerformSplice;
 var $observeEndPerformSplice;
 var $observeNativeObjectObserve;
 var $observeNativeObjectGetNotifier;
 var $observeNativeObjectNotifierPerformChange;
 
 (function(global, shared, exports) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
+// -------------------------------------------------------------------
+// Imports
+
 var GlobalArray = global.Array;
 var GlobalObject = global.Object;
+var InternalArray = shared.InternalArray;
 
 // -------------------------------------------------------------------
 
 // Overview:
 //
 // This file contains all of the routing and accounting for Object.observe.
 // User code will interact with these mechanisms via the Object.observe APIs
 // and, as a side effect of mutation objects which are observed. The V8 runtime
 // (both C++ and JS) will interact with these mechanisms primarily by enqueuing
 // proper change records for objects which were mutated. The Object.observe
@@ skipping 647 matching lines @@
 
 $observeNotifyChange = NotifyChange;
 $observeEnqueueSpliceRecord = EnqueueSpliceRecord;
 $observeBeginPerformSplice = BeginPerformSplice;
 $observeEndPerformSplice = EndPerformSplice;
 $observeNativeObjectObserve = NativeObjectObserve;
 $observeNativeObjectGetNotifier = NativeObjectGetNotifier;
 $observeNativeObjectNotifierPerformChange = NativeObjectNotifierPerformChange;
 
 })