Use entities in runtime_types

tests/compiler/dart2js/type_representation_test.dart

Index: tests/compiler/dart2js/type_representation_test.dart
diff --git a/tests/compiler/dart2js/type_representation_test.dart b/tests/compiler/dart2js/type_representation_test.dart
index f7ab52b4a99e0ec177df6e367658427a32e8c4d7..3acfddd65f32af3566687f749306639390ee1a78 100644
--- a/tests/compiler/dart2js/type_representation_test.dart
+++ b/tests/compiler/dart2js/type_representation_test.dart
@@ -10,8 +10,9 @@ import 'type_test_helper.dart';
 import 'package:compiler/src/elements/resolution_types.dart';
 import 'package:compiler/src/js/js.dart';
 import 'package:compiler/src/elements/elements.dart' show Element, ClassElement;
-import 'package:compiler/src/js_backend/js_backend.dart'
-    show JavaScriptBackend, TypeRepresentationGenerator;
+import 'package:compiler/src/js_backend/backend.dart' show JavaScriptBackend;
+import 'package:compiler/src/js_backend/runtime_types.dart'
+    show TypeRepresentationGenerator;
 import 'package:compiler/src/types/types.dart';
 import 'package:compiler/src/universe/world_builder.dart';