Enable analysis driver in tests where possible

pkg/analysis_server/test/search/element_references_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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol.dart';
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:test/test.dart';
@@ skipping 27 matching lines @@
     Response response = await waitResponse(request);
     var result = new SearchFindElementReferencesResult.fromResponse(response);
     searchId = result.id;
     searchElement = result.element;
     if (searchId != null) {
       await waitForSearchResults();
     }
     expect(serverErrors, isEmpty);
   }
 
+  @override
+  void setUp() {
+    enableNewAnalysisDriver = false;
+    super.setUp();
+  }
+
   test_constructor_named() async {
     addTestFile('''
 class A {
   A.named(p);
 }
 main() {
   new A.named(1);
   new A.named(2);
 }
 ''');
@@ skipping 615 matching lines @@
   }
 }
 
 @reflectiveTest
 class _NoSearchEngine extends AbstractSearchDomainTest {
   @override
   Index createIndex() {
     return null;
   }
 
+  @override
+  void setUp() {
+    enableNewAnalysisDriver = false;
+    super.setUp();
+  }
+
   test_requestError_noSearchEngine() async {
     addTestFile('''
 main() {
   var vvv = 1;
   print(vvv);
 }
 ''');
     Request request = new SearchFindElementReferencesParams(testFile, 0, false)
         .toRequest('0');
     Response response = await waitResponse(request);
     expect(response.error, isNotNull);
     expect(response.error.code, RequestErrorCode.NO_INDEX_GENERATED);
   }
 }