Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/issue_000044.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.
-
-// Parse error: but the parser should recover and create something that looks
-// like `a b(c) => d`.
-a b(c) = d;
-
-class C {
-  // Good constructor.
-  const C.constant();
-
-  // Bad constructor: missing factory keyword (and additional formals).
-  C.missingFactoryKeyword() = C.constant;
-
-  // Good redirecting const factory constructor.
-  const factory C.good() = C.constant;
-
-  // Parse error, the parser should recover and create a redirecting factory
-  // constructor body.
-  C notEvenAConstructor(a) = h;
-}
-
-main() {
-  C c = null;
-  print(const C.constant());
-  print(const C.missingFactoryKeyword());
-  print(const C.good());
-  print(new C.constant().notEvenAConstructor(null));
-}