Migrate block 44.

tests/language_strong/bool_condition_check_test.dart

-// Copyright (c) 2015, 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.
-
-// Check that passing `null` for a boolean typed parameter will still cause
-// a boolean conversion error when used in a condition in checked mode.
-
-import 'package:expect/expect.dart';
-
-@NoInline()
-String check({bool a, bool b}) {
-  String a_string = a ? 'a' : '';
-  String b_string = b ? 'b' : '';
-  return '$a_string$b_string';
-}
-
-class Class {
-  final String field;
-  Class({bool a: false, bool b: true}) : this.field = check(a: a, b: b);
-}
-
-main() {
-  Expect.equals('', new Class(a: null, b: null).field); //# 01: dynamic type error
-}