Move kernel baseline tests to front_end.

pkg/front_end/testcases/rasta/super.dart

 // Copyright (c) 2016, 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.
 
 class A {
   var a;
   var b;
   var c;
   var d;
   get e => null;
@@ skipping 240 matching lines @@
   }
 }
 
 use(x) {
   if (x == new DateTime.now().millisecondsSinceEpoch) throw "Shouldn't happen";
 }
 
 main() {
   new C().test();
 }