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
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index 0000000000000000000000000000000000000000..330ad22dcea37f8a16b6ddd795fe206215e82616
--- /dev/null
+++ b/pkg/barback/test/transformer/lazy_check_content_and_rename.dart
@@ -0,0 +1,20 @@
+// 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: oldExtension, oldContent: oldContent,
+              newExtension: newExtension, newContent: newContent);
+}