Use "package:" imports for pub.

test/barback/fails_if_args_with_all_test.dart

Index: test/barback/fails_if_args_with_all_test.dart
diff --git a/test/barback/fails_if_args_with_all_test.dart b/test/barback/fails_if_args_with_all_test.dart
index 42f79431d630a6b1ac02ab1945d9c6988860acef..d627eee592db59b68c7e0f46153ec1037b0d62fe 100644
--- a/test/barback/fails_if_args_with_all_test.dart
+++ b/test/barback/fails_if_args_with_all_test.dart
@@ -2,9 +2,9 @@
 // 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 'package:pub/src/exit_codes.dart' as exit_codes;
 import 'package:scheduled_test/scheduled_test.dart';
 
-import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';