Fix for GuestView exposure through shift().

extensions/renderer/resources/guest_view/guest_view.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This module implements a wrapper for a guestview that manages its
 // creation, attaching, and destruction.
 
 var CreateEvent = require('guestViewEvents').CreateEvent;
 var EventBindings = require('event_bindings');
 var GuestViewInternal = getInternalApi ?
@@ skipping 76 matching lines @@
   }
   this.pendingAction = null;
   this.performNextAction();
 };
 
 // Perform the next action in the queue, if one exists.
 GuestViewImpl.prototype.performNextAction = function() {
   // Make sure that there is not already an action in progress, and that there
   // exists a queued action to perform.
   if (!this.pendingAction && this.actionQueue.length) {
-    this.pendingAction = this.actionQueue.shift();
+    this.pendingAction = $Array.shift(this.actionQueue);
     this.pendingAction();
   }
 };
 
 // Check the current state to see if the proposed action is valid. Returns false
 // if invalid.
 GuestViewImpl.prototype.checkState = function(action) {
   // Create an error prefix based on the proposed action.
   var errorPrefix = 'Error calling ' + action + ': ';
 
@@ skipping 252 matching lines @@
   var internal = privates(this).internal;
   return internal.id;
 };
 
 // Exports
 if (!apiBridge) {
   exports.$set('GuestView', GuestView);
   exports.$set('GuestViewImpl', GuestViewImpl);
   exports.$set('ResizeEvent', ResizeEvent);
 }