Switch 'analyzer' to 'package:test' and test_reflective_loader ^0.1.0.

pkg/analyzer/test/file_system/test_all.dart

Index: pkg/analyzer/test/file_system/test_all.dart
diff --git a/pkg/analyzer/test/file_system/test_all.dart b/pkg/analyzer/test/file_system/test_all.dart
index 1714c0bc3def3811abe46a11200fc11629c90623..75a06d21c780820c3c27ac702857d2a96e29d782 100644
--- a/pkg/analyzer/test/file_system/test_all.dart
+++ b/pkg/analyzer/test/file_system/test_all.dart
@@ -4,9 +4,8 @@
 
 library analyzer.test.file_system.test_all;
 
-import 'package:unittest/unittest.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 
-import '../utils.dart';
 import 'memory_file_system_test.dart' as memory_file_system_test;
 import 'physical_resource_provider_test.dart'
     as physical_resource_provider_test;
@@ -14,10 +13,9 @@ import 'resource_uri_resolver_test.dart' as resource_uri_resolver_test;
 
 /// Utility for manually running all tests.
 main() {
-  initializeTestEnvironment();
-  group('file_system', () {
+  defineReflectiveSuite(() {
     memory_file_system_test.main();
     physical_resource_provider_test.main();
     resource_uri_resolver_test.main();
-  });
+  }, name: 'file system');
 }