Enable analysis driver in tests where possible

pkg/analysis_server/test/src/domain_abstract_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 'package:analysis_server/src/domain_abstract.dart';
 import 'package:analysis_server/src/plugin/plugin_manager.dart';
 import 'package:analysis_server/src/protocol_server.dart' hide Element;
 import 'package:analyzer_plugin/protocol/protocol.dart' as plugin;
 import 'package:analyzer_plugin/protocol/protocol_constants.dart' as plugin;
 import 'package:analyzer_plugin/protocol/protocol_generated.dart' as plugin;
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../analysis_abstract.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(AbstractRequestHandlerTest);
   });
 }
 
 @reflectiveTest
 class AbstractRequestHandlerTest extends AbstractAnalysisTest {
+  @override
+  void setUp() {
+    enableNewAnalysisDriver = true;
+    super.setUp();
+  }
+
   test_waitForResponses_empty_noTimeout() async {
     AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
     Map<PluginInfo, Future<plugin.Response>> futures =
         <PluginInfo, Future<plugin.Response>>{};
     List<plugin.Response> responses = await handler.waitForResponses(futures);
     expect(responses, isEmpty);
   }
 
   test_waitForResponses_empty_timeout() async {
     AbstractRequestHandler handler = new TestAbstractRequestHandler(server);
@@ skipping 60 matching lines @@
 
 class TestAbstractRequestHandler extends AbstractRequestHandler {
   TestAbstractRequestHandler(server) : super(server);
 
   @override
   Response handleRequest(Request request) {
     fail('Unexpected invocation of handleRequest');
     return null;
   }
 }