Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/src/summary/in_summary_source_test.dart

Index: pkg/analyzer/test/src/summary/in_summary_source_test.dart
diff --git a/pkg/analyzer/test/src/summary/in_summary_source_test.dart b/pkg/analyzer/test/src/summary/in_summary_source_test.dart
index f83d30ab9ef91cc68b73b2f53f1cfb539faca525..b48669dc7a98b62bf3a919584c9ceec38e618dfb 100644
--- a/pkg/analyzer/test/src/summary/in_summary_source_test.dart
+++ b/pkg/analyzer/test/src/summary/in_summary_source_test.dart
@@ -10,13 +10,12 @@ import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/summary/package_bundle_reader.dart';
 import 'package:path/path.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../../reflective_tests.dart';
-
 main() {
   groupSep = ' | ';
-  runReflectiveTests(InSummarySourceTest);
+  defineReflectiveTests(InSummarySourceTest);
 }
 
 @reflectiveTest