Get rid of all the library tags.

lib/src/backend/declarer.dart

 // 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.
 
-library test.backend.declarer;
-
 import 'dart:async';
 
 import '../frontend/timeout.dart';
 import '../utils.dart';
 import 'group.dart';
 import 'group_entry.dart';
 import 'invoker.dart';
 import 'metadata.dart';
 import 'test.dart';
 
@@ skipping 204 matching lines @@
     var completer = new Completer();
 
     Invoker.current.addOutstandingCallback();
     Invoker.current.waitForOutstandingCallbacks(() {
       new Future.sync(body).whenComplete(completer.complete);
     }).then((_) => Invoker.current.removeOutstandingCallback());
 
     return completer.future;
   }
 }