Add cross-origin test with credentials.

pkg/intl/test/date_time_format_uninitialized_test.dart

Index: pkg/intl/test/date_time_format_uninitialized_test.dart
diff --git a/pkg/intl/test/date_time_format_uninitialized_test.dart b/pkg/intl/test/date_time_format_uninitialized_test.dart
index afbeb233076d9958ec090baa8816d33338535d99..dcd97cdd6354f3060a0516557edf261455e5a9ad 100644
--- a/pkg/intl/test/date_time_format_uninitialized_test.dart
+++ b/pkg/intl/test/date_time_format_uninitialized_test.dart
@@ -8,10 +8,10 @@
  */
 library date_time_format_file_test;
 
-import '../lib/intl.dart';
-import '../lib/date_symbol_data_local.dart';
+import 'package:intl/intl.dart';
+import 'package:intl/date_symbol_data_local.dart';
 import 'date_time_format_test_core.dart';
-import '../../../pkg/unittest/lib/unittest.dart';
+import 'package:unittest/unittest.dart';
 
 main() {
   runDateTests(['en_US']);