[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/resources/web_request_event.js

 // Copyright 2017 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.
 
 var CHECK = requireNative('logging').CHECK;
 var eventBindings = bindingUtil ? undefined : require('event_bindings');
 var idGeneratorNatives = requireNative('id_generator');
 var utils = require('utils');
 var validate = require('schemaUtils').validate;
 var webRequestInternal = getInternalApi ?
     getInternalApi('webRequestInternal') :
     require('binding').Binding.create('webRequestInternal').generate();
 
 function getUniqueSubEventName(eventName) {
   return eventName + '/' + idGeneratorNatives.GetNextId();
 }
 
 function createSubEvent(name, argSchemas) {
-  if (bindingUtil)
-    return bindingUtil.createCustomEvent(name, undefined, false);
+  if (bindingUtil) {
+    var supportsFilters = false;
+    var supportsLazyListeners = true;
+    return bindingUtil.createCustomEvent(name, undefined,
+                                         supportsFilters,
+                                         supportsLazyListeners);
+  }
   return new eventBindings.Event(name, argSchemas);
 }
 
 // WebRequestEventImpl object. This is used for special webRequest events
 // with extra parameters. Each invocation of addListener creates a new named
 // sub-event. That sub-event is associated with the extra parameters in the
 // browser process, so that only it is dispatched when the main event occurs
 // matching the extra parameters.
 //
 // Example:
@@ skipping 139 matching lines @@
     'addListener',
     'removeListener',
     'addRules',
     'removeRules',
     'getRules',
   ],
 });
 
 exports.$set('WebRequestEvent', WebRequestEvent);
 exports.$set('createWebRequestEvent', createWebRequestEvent);