pkg/intl: cleanup after message extraction test

pkg/intl/test/message_extraction/message_extraction_test.dart

Index: pkg/intl/test/message_extraction/message_extraction_test.dart
diff --git a/pkg/intl/test/message_extraction/message_extraction_test.dart b/pkg/intl/test/message_extraction/message_extraction_test.dart
index 9d8e783651452fd4d7e4ea244d84890d2de360f1..92aa3e652b2561b76b2c0a1180942ab77307582c 100644
--- a/pkg/intl/test/message_extraction/message_extraction_test.dart
+++ b/pkg/intl/test/message_extraction/message_extraction_test.dart
@@ -61,14 +61,15 @@ main() {
       return generateCodeFromTranslation(result);
     }).then((result) {
       return runGeneratedCode(result);
-    }).then(verifyResult);
+    }).then(verifyResult)
+    .whenComplete(deleteGeneratedFiles);
   });
 }
 
 void deleteGeneratedFiles() {
   var files = [dir('intl_messages.json'), dir('translation_fr.json'),
-      dir('messages_fr.dart'), dir('message_de_DE.dart'),
-      dir('messages_all.dart')];
+      dir('messages_fr.dart'), dir('messages_de_DE.dart'),
+      dir('translation_de_DE.json'), dir('messages_all.dart')];
   files.map((name) => new File(name)).forEach((x) {
     if (x.existsSync()) x.deleteSync();});
 }