Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/src/source/source_resource_test.dart

Index: pkg/analyzer/test/src/source/source_resource_test.dart
diff --git a/pkg/analyzer/test/src/source/source_resource_test.dart b/pkg/analyzer/test/src/source/source_resource_test.dart
index 28b131e1a79a92cf3f5cbb903bc035c8495c1fa1..e2a918361563a80c34130754be6c57edbd591196 100644
--- a/pkg/analyzer/test/src/source/source_resource_test.dart
+++ b/pkg/analyzer/test/src/source/source_resource_test.dart
@@ -13,15 +13,15 @@ import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/source/source_resource.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../../reflective_tests.dart';
 import '../../utils.dart';
 import '../context/mock_sdk.dart';
 
 main() {
   initializeTestEnvironment();
-  runReflectiveTests(FileSourceTest);
+  defineReflectiveTests(FileSourceTest);
 }
 
 @reflectiveTest