[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/resources/guest_view/guest_view_events.js

 // Copyright 2015 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.
 
 // Event management for GuestViewContainers.
 
 var GuestViewInternalNatives = requireNative('guest_view_internal');
 var MessagingNatives = requireNative('messaging_natives');
 
 var EventBindings;
 var CreateEvent = function(name) {
   if (bindingUtil) {
     return bindingUtil.createCustomEvent(name, null,
-                                         true /* supportsFilters */);
+                                         true /* supportsFilters */,
+                                         false /* supportsLazyListeners */);
   }
-  var eventOpts = {supportsListeners: true, supportsFilters: true};
+  var eventOpts = {
+    __proto__: null,
+    supportsListeners: true,
+    supportsFilters: true,
+    // GuestView-related events never support lazy listeners.
+    supportsLazyListeners: false,
+  };
   if (!EventBindings)
     EventBindings = require('event_bindings');
   return new EventBindings.Event(name, undefined, eventOpts);
 };
 
 function GuestViewEvents(view) {
   view.events = this;
 
   this.view = view;
   this.on = {};
@@ skipping 155 matching lines @@
     return $Function.apply(func, view.events, $Array.slice(arguments));
   };
 };
 
 // Implemented by the derived event manager, if one exists.
 GuestViewEvents.prototype.getEvents = function() { return {}; };
 
 // Exports.
 exports.$set('GuestViewEvents', GuestViewEvents);
 exports.$set('CreateEvent', CreateEvent);