Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/dart/ast/visitor_test.dart

Index: pkg/analyzer/test/dart/ast/visitor_test.dart
diff --git a/pkg/analyzer/test/dart/ast/visitor_test.dart b/pkg/analyzer/test/dart/ast/visitor_test.dart
index 1645daaa53adaa299617ff2e8cd5d6df7523e21e..45ba1962ea642f121fec5985fc430d32cbd71dc9 100644
--- a/pkg/analyzer/test/dart/ast/visitor_test.dart
+++ b/pkg/analyzer/test/dart/ast/visitor_test.dart
@@ -6,16 +6,16 @@ library analyzer.test.dart.ast.visitor_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../generated/parser_test.dart' show ParserTestCase;
 import '../../generated/test_support.dart';
-import '../../reflective_tests.dart';
 import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  runReflectiveTests(BreadthFirstVisitorTest);
+  defineReflectiveTests(BreadthFirstVisitorTest);
 }
 
 @reflectiveTest