Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/top_level_accessors_part.dart

Index: pkg/front_end/test/fasta/top_level_accessors_part.dart
diff --git a/pkg/front_end/test/fasta/top_level_accessors_part.dart b/pkg/front_end/test/fasta/top_level_accessors_part.dart
deleted file mode 100644
index 6aeed084ba637468d8796833f1ad7ccc12746453..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/top_level_accessors_part.dart
+++ /dev/null
@@ -1,16 +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 file.
-
-part of top_level_accessors;
-
-void set exitCode(int code) {
-  print(code);
-}
-
-int get exitCode => 0;
-
-main() {
-  exitCode = 42;
-  print(exitCode);
-}