More strong mode changes to analysis_server

pkg/analysis_server/test/channel/web_socket_channel_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 test.channel.web_socket;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/channel/web_socket_channel.dart';
@@ skipping 17 matching lines @@
     test('requestResponse', WebSocketChannelTest.requestResponse);
     test('response', WebSocketChannelTest.response);
   });
 }
 
 class WebSocketChannelTest {
   static MockSocket socket;
   static WebSocketClientChannel client;
   static WebSocketServerChannel server;
 
-  static List requestsReceived;
-  static List responsesReceived;
-  static List notificationsReceived;
+  static List<Request> requestsReceived;
+  static List<Response> responsesReceived;
+  static List<Notification> notificationsReceived;
 
   static Future close() {
     var timeout = new Duration(seconds: 1);
     var future = client.responseStream.drain().timeout(timeout);
     client.close();
     return future;
   }
 
   static void expectMsgCount(
       {requestCount: 0, responseCount: 0, notificationCount: 0}) {
@@ skipping 86 matching lines @@
       expectMsgCount(responseCount: 1);
     });
   }
 
   static void setUp() {
     socket = new MockSocket.pair();
     client = new WebSocketClientChannel(socket);
     server = new WebSocketServerChannel(
         socket.twin, InstrumentationService.NULL_SERVICE);
 
-    requestsReceived = [];
-    responsesReceived = [];
-    notificationsReceived = [];
+    requestsReceived = <Request>[];
+    responsesReceived = <Response>[];
+    notificationsReceived = <Notification>[];
 
     // Allow multiple listeners on server side for testing.
     socket.twin.allowMultipleListeners();
 
     server.listen(requestsReceived.add);
     client.responseStream.listen(responsesReceived.add);
     client.notificationStream.listen(notificationsReceived.add);
   }
 }