Ensure that privates are private.

chrome/renderer/resources/extensions/web_view/chrome_web_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 chrome-specific <webview> API.
 // See web_view_api_methods.js for details.
 
 var ChromeWebView = require('chromeWebViewInternal').ChromeWebView;
 var ChromeWebViewSchema =
     requireNative('schema_registry').GetSchema('chromeWebViewInternal');
 var CreateEvent = require('guestViewEvents').CreateEvent;
 var EventBindings = require('event_bindings');
 var GuestViewInternalNatives = requireNative('guest_view_internal');
 var idGeneratorNatives = requireNative('id_generator');
-var Utils = require('utils');
+var utils = require('utils');
 var WebViewImpl = require('webView').WebViewImpl;
 
 // This is the only "webViewInternal.onClicked" named event for this renderer.
 //
 // Since we need an event per <webview>, we define events with suffix
 // (subEventName) in each of the <webview>. Behind the scenes, this event is
 // registered as a ContextMenusEvent, with filter set to the webview's
 // |viewInstanceId|. Any time a ContextMenusEvent is dispatched, we re-dispatch
 // it to the subEvent's listeners. This way
 // <webview>.contextMenus.onClicked behave as a regular chrome Event type.
@@ skipping 89 matching lines @@
 WebViewContextMenusImpl.prototype.removeAll = function() {
   var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
   return $Function.apply(ChromeWebView.contextMenusRemoveAll, null, args);
 };
 
 WebViewContextMenusImpl.prototype.update = function() {
   var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
   return $Function.apply(ChromeWebView.contextMenusUpdate, null, args);
 };
 
-var WebViewContextMenus = Utils.expose(
-    'WebViewContextMenus', WebViewContextMenusImpl,
-    { functions: ['create', 'remove', 'removeAll', 'update'] });
+function WebViewContextMenus() {
+  privates(WebViewContextMenus).constructPrivate(this, arguments);
+}
+utils.expose(WebViewContextMenus, WebViewContextMenusImpl, {
+  functions: [
+    'create',
+    'remove',
+    'removeAll',
+    'update',
+  ],
+});
 
 // -----------------------------------------------------------------------------
 
 WebViewImpl.prototype.maybeSetupContextMenus = function() {
   if (!this.contextMenusOnContextMenuEvent_) {
     var eventName = 'chromeWebViewInternal.onContextMenuShow';
     var eventSchema =
-        Utils.lookup(ChromeWebViewSchema.events, 'name', 'onShow');
+        utils.lookup(ChromeWebViewSchema.events, 'name', 'onShow');
     var eventOptions = {supportsListeners: true};
     this.contextMenusOnContextMenuEvent_ = new ContextMenusOnContextMenuEvent(
         this.viewInstanceId, eventName, eventSchema, eventOptions);
   }
 
   var createContextMenus = function() {
     return this.weakWrapper(function() {
       if (this.contextMenus_) {
         return this.contextMenus_;
       }
 
       this.contextMenus_ = new WebViewContextMenus(this.viewInstanceId);
 
       // Define 'onClicked' event property on |this.contextMenus_|.
       var getOnClickedEvent = function() {
         return this.weakWrapper(function() {
           if (!this.contextMenusOnClickedEvent_) {
             var eventName = 'chromeWebViewInternal.onClicked';
             var eventSchema =
-                Utils.lookup(ChromeWebViewSchema.events, 'name', 'onClicked');
+                utils.lookup(ChromeWebViewSchema.events, 'name', 'onClicked');
             var eventOptions = {supportsListeners: true};
             var onClickedEvent = new ContextMenusOnClickedEvent(
                 this.viewInstanceId, eventName, eventSchema, eventOptions);
             this.contextMenusOnClickedEvent_ = onClickedEvent;
             return onClickedEvent;
           }
           return this.contextMenusOnClickedEvent_;
         });
       }.bind(this);
       $Object.defineProperty(
@@ skipping 21 matching lines @@
       'contextMenus',
       {
         get: createContextMenus(),
         enumerable: true
       });
 };
 
 function GetUniqueSubEventName(eventName) {
   return eventName + '/' + idGeneratorNatives.GetNextId();
 }