Added reply field to blink NotificationEvent (not yet piped through)

third_party/WebKit/LayoutTests/http/tests/notifications/resources/serviceworker-notification-event.js

 importScripts('../../serviceworker/resources/worker-testharness.js');
 
 let messagePort = null;
 addEventListener('message', workerEvent => {
     messagePort = workerEvent.data;
     messagePort.postMessage('ready');
 });
 
 addEventListener('notificationclick', e => runTest(e.notification));
 
@@ skipping 12 matching lines @@
 
       const event = new NotificationEvent('NotificationEvent', { notification });
 
       assert_equals(event.type, 'NotificationEvent');
       assert_idl_attribute(event, 'notification');
       assert_idl_attribute(event, 'action');
       assert_equals(event.cancelable, false);
       assert_equals(event.bubbles, false);
       assert_equals(event.notification, notification);
       assert_equals(event.action, '');
+      assert_equals(event.reply, '');
       assert_inherits(event, 'waitUntil');
 
       const customEvent = new NotificationEvent('NotificationEvent', {
                               notification: notification,
+                              reply: 'my reply',
                               bubbles: true,
                               cancelable: true });
 
       assert_equals(customEvent.type, 'NotificationEvent');
       assert_equals(customEvent.cancelable, true);
       assert_equals(customEvent.bubbles, true);
       assert_equals(customEvent.notification, notification);
+      assert_equals(customEvent.reply, 'my reply');
     } catch (e) {
       result.success = false;
       result.message = e.message + '\n' + e.stack;
     }
     // Signal to the document that the test has finished running.
     messagePort.postMessage(result);
 }