Get rid of all the library tags.

test/chain/utils.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 stack_trace.test.chain.utils;
-
 import 'dart:async';
 
 import 'package:stack_trace/stack_trace.dart';
 import 'package:test/test.dart';
 
 /// Runs [callback] in a microtask callback.
 void inMicrotask(callback()) => scheduleMicrotask(callback);
 
 /// Runs [callback] in a one-shot timer callback.
 void inOneShotTimer(callback()) => Timer.run(callback);
@@ skipping 67 matching lines @@
 ///
 /// [callback] is expected to throw the string `"error"`.
 Future<Chain> captureFuture(callback()) {
   var completer = new Completer<Chain>();
   Chain.capture(callback, onError: (error, chain) {
     expect(error, equals('error'));
     completer.complete(chain);
   });
   return completer.future;
 }