Add cross-origin test with credentials.

pkg/intl/test/date_time_format_file_test_stub.dart

Index: pkg/intl/test/date_time_format_file_test_stub.dart
diff --git a/pkg/intl/test/date_time_format_file_test_stub.dart b/pkg/intl/test/date_time_format_file_test_stub.dart
index 6306bfbda2bd021cb87b0905b606b67dde4671de..7e82ef637c4d884689c9de7c581520d9ee0ff0e6 100644
--- a/pkg/intl/test/date_time_format_file_test_stub.dart
+++ b/pkg/intl/test/date_time_format_file_test_stub.dart
@@ -8,12 +8,12 @@
  */
 library date_time_format_file_test;
 
-import '../lib/intl.dart';
-import '../lib/date_symbol_data_file.dart';
+import 'package:intl/intl.dart';
+import 'package:intl/date_symbol_data_file.dart';
 import 'dart:io';
 import 'date_time_format_test_core.dart';
 import 'data_directory.dart';
-import '../../../pkg/unittest/lib/unittest.dart';
+import 'package:unittest/unittest.dart';
 
 runWith([Function getSubset]) {
   // Initialize one locale just so we know what the list is.