Format all tests.

tests/lib_strong/html/cross_domain_iframe_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:html';
 
 import 'package:unittest/unittest.dart';
 
 main() {
   test('cross_domain_iframe', () {
     var uri = Uri.parse(window.location.href);
 
     var crossOriginPort = int.parse(uri.queryParameters['crossOriginPort']);
     var crossOrigin = '${uri.scheme}://${uri.host}:$crossOriginPort';
     var crossOriginUrl =
         '$crossOrigin/root_dart/tests/html/cross_domain_iframe_script.html';
 
     var iframe = new IFrameElement();
     iframe.src = crossOriginUrl;
     document.body.append(iframe);
 
-    window.onMessage.where((MessageEvent event) {
-      return event.origin == crossOrigin;
-    }).first.then(expectAsync((MessageEvent event) {
-      expect(event.data, equals('foobar'));
-      expect(event.source, isNotNull);
-    }));
+    window.onMessage
+        .where((MessageEvent event) {
+          return event.origin == crossOrigin;
+        })
+        .first
+        .then(expectAsync((MessageEvent event) {
+          expect(event.data, equals('foobar'));
+          expect(event.source, isNotNull);
+        }));
   });
 }