Use generated classes to create requests in analysis server unit tests.

pkg/analysis_server/test/search/search_domain_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.search.domain;
 
 import 'package:analysis_server/src/analysis_server.dart';
-import 'package:analysis_server/src/constants.dart';
-import 'package:analysis_server/src/protocol.dart';
+import 'package:analysis_server/src/protocol2.dart';
 import 'package:analysis_server/src/search/search_domain.dart';
 import 'package:analysis_testing/mock_sdk.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:unittest/unittest.dart';
 
 import '../mocks.dart';
 
 
 main() {
   groupSep = ' | ';
@@ skipping 10 matching lines @@
         serverChannel,
         resourceProvider,
         new MockPackageMapProvider(),
         null,
         new MockSdk());
     handler = new SearchDomainHandler(server);
   });
 
   group('SearchDomainHandler', () {
     test('findMemberReferences', () {
-      var request = new Request('0', SEARCH_FIND_MEMBER_REFERENCES);
-      request.setParameter(NAME, null);
+      // TODO(paulberry): Why are we passing null here?
+      var request = new SearchFindMemberReferencesParams(null).toRequest('0');
       var response = handler.handleRequest(request);
       // TODO(brianwilkerson) implement
       //expect(response, isNull);
     });
   });
 }