Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/generated/incremental_scanner_test.dart

Index: pkg/analyzer/test/generated/incremental_scanner_test.dart
diff --git a/pkg/analyzer/test/generated/incremental_scanner_test.dart b/pkg/analyzer/test/generated/incremental_scanner_test.dart
index b7623380c986fd3ab742a94df9ffb7ab19406ff2..4464f5cdcab406e91ce10771f00a2d0d2bd8d836 100644
--- a/pkg/analyzer/test/generated/incremental_scanner_test.dart
+++ b/pkg/analyzer/test/generated/incremental_scanner_test.dart
@@ -11,15 +11,15 @@ import 'package:analyzer/src/dart/scanner/scanner.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/incremental_scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart';
 
-import '../reflective_tests.dart';
 import '../utils.dart';
 import 'test_support.dart';
 
 main() {
   initializeTestEnvironment();
-  runReflectiveTests(IncrementalScannerTest);
+  defineReflectiveTests(IncrementalScannerTest);
 }
 
 @reflectiveTest