Add requestTime to responses

pkg/analysis_server/test/src/plugin/plugin_manager_test.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 import 'dart:io' as io;
 
 import 'package:analysis_server/src/plugin/notification_manager.dart';
 import 'package:analysis_server/src/plugin/plugin_manager.dart';
 import 'package:analyzer/context/context_root.dart';
@@ skipping 429 matching lines @@
   void test_handleOnError() {
     session.handleOnError(<String>['message', 'trace']);
     fail('The method handleOnError is not implemented');
   }
 
   test_handleResponse() async {
     new TestServerCommunicationChannel(session);
     Response response = new PluginVersionCheckResult(
             true, 'name', 'version', <String>[],
             contactInfo: 'contactInfo')
-        .toResponse('0');
+        .toResponse('0', 1);
     Future<Response> future =
         session.sendRequest(new PluginVersionCheckParams('', '', ''));
     expect(session.pendingRequests, hasLength(1));
     session.handleResponse(response);
     expect(session.pendingRequests, hasLength(0));
     Response result = await future;
     expect(result, same(response));
   }
 
   void test_nextRequestId() {
@@ skipping 227 matching lines @@
       void onNotification(Notification notification),
       {Function onError, void onDone()}) {
     fail('Unexpected invocation of listen');
   }
 
   @override
   void sendRequest(Request request) {
     sentRequests.add(request);
   }
 }