Restructure outline shaker tests.

pkg/front_end/testcases/shaker/typedefs_in_types.dart

Index: pkg/front_end/testcases/shaker/typedefs_in_types.dart
diff --git a/pkg/front_end/testcases/shaker/typedefs_in_types.dart b/pkg/front_end/testcases/shaker/typedefs_in_types.dart
deleted file mode 100644
index c640fc068d67016b2f27f9d5ba2ce3e67c55e050..0000000000000000000000000000000000000000
--- a/pkg/front_end/testcases/shaker/typedefs_in_types.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE.md file.
-
-import 'lib/lib.dart';
-
-/// Kernel directly represents this as a type, so typedef is not preserved.
-foo(Typedef1<dynamic> x) => null;
-
-bar(Typedef2 x) => null;