Get rid of all the library tags.

test/html/client_test.dart

 // 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 client_test;
-
 import 'package:http/http.dart' as http;
 import 'package:http/browser_client.dart';
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
 
 void main() {
   test('#send a StreamedRequest', () {
     var client = new BrowserClient();
     var request = new http.StreamedRequest("POST", echoUrl);
@@ skipping 11 matching lines @@
     var url = Uri.parse('http://http.invalid');
     var request = new http.StreamedRequest("POST", url);
 
     expect(client.send(request),
         throwsClientException("XMLHttpRequest error."));
 
     request.sink.add('{"hello": "world"}'.codeUnits);
     request.sink.close();
   });
 }