Run dartfmt on all files under runtime.

runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart

Index: runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart b/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
index cbdebba190fb607c410459b2e21b5195defe76fd..1b647d86e595067262f0b275c78d96a130cb06d8 100644
--- a/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
@@ -52,12 +52,11 @@ main() {
   });
   group('elements', () {
     test('created after attachment', () async {
-      final repository =
-          new NotificationRepositoryMock(list: [
-            new ExceptionNotificationMock(exception: new Exception("ex")),
-            const EventNotificationMock(event: const VMUpdateEventMock(vm: vm)),
-            const EventNotificationMock(event: const VMUpdateEventMock(vm: vm))
-          ]);
+      final repository = new NotificationRepositoryMock(list: [
+        new ExceptionNotificationMock(exception: new Exception("ex")),
+        const EventNotificationMock(event: const VMUpdateEventMock(vm: vm)),
+        const EventNotificationMock(event: const VMUpdateEventMock(vm: vm))
+      ]);
       final e = new NavNotifyElement(repository);
       document.body.append(e);
       await e.onRendered.first;
@@ -72,11 +71,11 @@ main() {
     test('react to notifyOnPause change', () async {
       final NotificationRepositoryMock repository =
           new NotificationRepositoryMock(list: [
-            new ExceptionNotificationMock(exception: new Exception("ex")),
-            const EventNotificationMock(event: const VMUpdateEventMock()),
-            const EventNotificationMock(
-                event: const PauseStartEventMock(isolate: isolate))
-          ]);
+        new ExceptionNotificationMock(exception: new Exception("ex")),
+        const EventNotificationMock(event: const VMUpdateEventMock()),
+        const EventNotificationMock(
+            event: const PauseStartEventMock(isolate: isolate))
+      ]);
       final e = new NavNotifyElement(repository, notifyOnPause: true);
       document.body.append(e);
       await e.onRendered.first;