Introduce transformers for:

lib/src/transform.dart

Index: lib/src/transform.dart
diff --git a/test/data/input/observe_in_part.dart b/lib/src/transform.dart
similarity index 51%
copy from test/data/input/observe_in_part.dart
copy to lib/src/transform.dart
index d7362f893a80544b8517d039456de10b70141bee..48b78e70b1317f1fd7c8797f9057542e7310dbde 100644
--- a/test/data/input/observe_in_part.dart
+++ b/lib/src/transform.dart
@@ -2,6 +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.
 
-part of observe_in_part_test;
+/** Transfomers used for pub-serve and pub-deploy. */
+library polymer.src.transform;
 
-@observable var message = 'hello';
+export 'transform/code_extractor.dart';
+export 'transform/import_inliner.dart';
+export 'transform/script_compactor.dart';