Enable analysis driver in tests where possible

pkg/analysis_server/test/search/member_declarations_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:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 29 matching lines @@
     for (SearchResult result in results) {
       Element element = result.path[0];
       Element clazz = result.path[1];
       if (element.kind == kind && clazz.name == enclosingClass) {
         return result;
       }
     }
     return null;
   }
 
+  @override
+  void setUp() {
+    enableNewAnalysisDriver = true;
+    super.setUp();
+  }
+
   test_localVariable() async {
     addTestFile('''
 class A {
   main() {
     var foo = 42;
   }
 }
 ''');
     await findMemberDeclarations('foo');
     expect(results, isEmpty);
@@ skipping 87 matching lines @@
 class B {
   set foo(x) {}
 }
 ''');
     await findMemberDeclarations('foo');
     expect(results, hasLength(2));
     assertHasDeclaration(ElementKind.METHOD, 'A');
     assertHasDeclaration(ElementKind.SETTER, 'B');
   }
 }