Expand barback's notion of dirtiness to understand declaredness.

pkg/barback/test/transformer/lazy_check_content_and_rename.dart

Index: pkg/barback/test/transformer/lazy_check_content_and_rename.dart
diff --git a/pkg/barback/test/transformer/lazy_check_content_and_rename.dart b/pkg/barback/test/transformer/lazy_check_content_and_rename.dart
new file mode 100644
index 0000000000000000000000000000000000000000..5d31690bf0b2d7840dc31bbf4b099b987c0ff24c
--- /dev/null
+++ b/pkg/barback/test/transformer/lazy_check_content_and_rename.dart
@@ -0,0 +1,19 @@
+// Copyright (c) 2014, 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.
+
+library barback.test.transformer.lazy_check_content_and_rename;
+
+import 'dart:async';
+
+import 'package:barback/barback.dart';
+
+import 'declaring_check_content_and_rename.dart';
+
+class LazyCheckContentAndRenameTransformer
+    extends DeclaringCheckContentAndRenameTransformer
+    implements LazyTransformer {
+  LazyCheckContentAndRenameTransformer(String oldExtension,
+        String oldContent, String newExtension, String newContent)
+      : super(oldExtension, oldContent, newExtension, newContent);
+}