Replace @ReflectiveTestCase() with @reflectiveTest.

pkg/analysis_server/test/analysis_server_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.analysis_server;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 11 matching lines @@
 
 import 'mock_sdk.dart';
 import 'mocks.dart';
 import 'reflective_tests.dart';
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(AnalysisServerTest);
 }
 
-@ReflectiveTestCase()
+@reflectiveTest
 class AnalysisServerTest {
   MockServerChannel channel;
   AnalysisServer server;
   MemoryResourceProvider resourceProvider;
 
   /**
    * Verify that getAnalysisContextForSource returns the correct contexts even
    * for sources that are included by multiple contexts.
    *
    * See dartbug.com/21898
@@ skipping 289 matching lines @@
   @override
   Response handleRequest(Request request) {
     if (request.method == 'echo') {
       return new Response(request.id, result: {
         'echo': true
       });
     }
     return null;
   }
 }