change to source-order crawling of directives instead of alphabetical

test/parts/bar.dart

Index: test/parts/bar.dart
diff --git a/test/foo.dart b/test/parts/bar.dart
similarity index 71%
copy from test/foo.dart
copy to test/parts/bar.dart
index a62e12f986c5332b0efc2cf66341405698aebac1..4aa5f5c86485f8e41737de9b68796755b081aa52 100644
--- a/test/foo.dart
+++ b/test/parts/bar.dart
@@ -1,16 +1,16 @@
 // Copyright (c) 2015, 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.
-@initializeTracker
-library initialize.test.foo;
+part of initialize.initializer_parts_test;
 
-import 'package:initialize/src/initialize_tracker.dart';
+@initializeTracker
+class Bar2 {}
 
 @initializeTracker
-class Foo {}
+class Bar {}
 
 @initializeTracker
-fooBar() {}
+bar2() {}
 
 @initializeTracker
-foo() {}
+bar() {}