Move kernel baseline tests to front_end.

pkg/kernel/testcases/input/named_parameters.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 file.
-class Superclass {
-  foo({alpha, beta}) {}
-  bar({beta, alpha}) {}
-
-  namedCallback(callback({String alpha, int beta})) {
-    callback(alpha: 'one', beta: 2);
-    callback(beta: 1, alpha: 'two');
-  }
-}
-
-class Subclass extends Superclass {
-  foo({beta, alpha}) {}
-  bar({alpha, beta}) {}
-
-  namedCallback(callback({int beta, String alpha})) {}
-}
-
-topLevelNamed(beta, alpha, {gamma, delta}) {}
-topLevelOptional(beta, alpha, [gamma, delta]) {}
-
-main() {
-  new Subclass().foo(beta: 1, alpha: 2);
-  new Subclass().foo(alpha: 1, beta: 2);
-  topLevelNamed(1, 2, gamma: 3, delta: 4);
-  topLevelNamed(1, 2, delta: 3, gamma: 4);
-}