Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/file_system/physical_resource_provider_test.dart

Index: pkg/analyzer/test/file_system/physical_resource_provider_test.dart
diff --git a/pkg/analyzer/test/file_system/physical_resource_provider_test.dart b/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
index 0308293ebcdad09ee4e9b660bed74e4084b18a64..42b8111132eb7f51082d715b7d76590d9661a68c 100644
--- a/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
+++ b/pkg/analyzer/test/file_system/physical_resource_provider_test.dart
@@ -12,18 +12,18 @@ import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:path/path.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 import 'package:watcher/watcher.dart';
 
-import '../reflective_tests.dart';
 import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
   if (!new bool.fromEnvironment('skipPhysicalResourceProviderTests')) {
-    runReflectiveTests(PhysicalResourceProviderTest);
-    runReflectiveTests(FileTest);
-    runReflectiveTests(FolderTest);
+    defineReflectiveTests(PhysicalResourceProviderTest);
+    defineReflectiveTests(FileTest);
+    defineReflectiveTests(FolderTest);
   }
 }