Use promises in notifications tests and enable controlling the page.

third_party/WebKit/LayoutTests/http/tests/notifications/resources/notification-data-reflection-test.js

 // Tests that the notification available after the given operation is executed
 // accurately reflects the data attributes of several types with which the
 // notification was created in the document.
 function runNotificationDataReflectionTest(test, notificationOperation) {
     var scope = 'resources/scope/' + location.pathname,
-        script = 'resources/instrumentation-service-worker.js';
+        script = 'instrumentation-service-worker.js';
 
     // Set notification's data of several types to a structured clone of options's data.
     var notificationDataList = new Array(
         true, // Check Boolean type
         1024, // Check Number type
         Number.NaN, // Check Number.NaN type
         'any data', // Check String type
         null, // Check null
         new Array('Saab', 'Volvo', 'BMW'),  // Check Array type
         { first: 'first', second: 'second' }  // Check object
@@ skipping 44 matching lines @@
                 if (++pos < notificationDataList.length)
                     assertNotificationDataReflects(pos);
                 else
                     test.done();
             });
 
             assertNotificationDataReflects(0);
         }).catch(unreached_rejection(test));
     });
 }