Add layout tests for ServiceWorker's notificationclose event.

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';
+
+    // 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
+    );
+
+    PermissionsHelper.setPermission('notifications', 'granted').then(function() {
+        getActiveServiceWorkerWithMessagePort(test, script, scope).then(function(workerInfo) {
+            // (1) Tell the Service Worker to display a Web Notification.
+            var assertNotificationDataReflects = function(pos) {
+                workerInfo.port.postMessage({
+                    command: 'show',
+
+                    title: scope,
+                    options: {
+                        title: scope,
+                        tag: pos,
+                        data: notificationDataList[pos]
+                    }
+                });
+            };
+
+            workerInfo.port.addEventListener('message', function(event) {
+                if (typeof event.data != 'object' || !event.data.command) {
+                    assert_unreached('Invalid message from the Service Worker.');
+                    return;
+                }
+
+                // (2) Listen for confirmation from the Service Worker that the
+                // notification's display promise has been resolved.
+                if (event.data.command == 'show') {
+                    assert_true(event.data.success, 'The notification must have been displayed.');
+                    notificationOperation.run(scope);
+                    return;
+                }
+
+                // (3) Listen for confirmation from the Service Worker that the
+                // notification has been closed. Make sure that all properties
+                // set on the Notification object are as expected.
+                assert_equals(event.data.command, notificationOperation.name, 'Notification was expected to receive different operation');
+
+                var pos = event.data.notification.tag;
+
+                if (typeof notificationDataList[pos] === 'object' && notificationDataList[pos] !== null)
+                    assert_object_equals(event.data.notification.data, notificationDataList[pos], 'The data field must be the same.');
+                else
+                    assert_equals(event.data.notification.data, notificationDataList[pos], 'The data field must be the same.');
+
+                if (++pos < notificationDataList.length)
+                    assertNotificationDataReflects(pos);
+                else
+                    test.done();
+            });
+
+            assertNotificationDataReflects(0);
+        }).catch(unreached_rejection(test));
+    });
+}