Migrate block 162 to Dart 2.0.

tests/language_strong/type_variable_bounds4_test.dart

-// Copyright (c) 2013, 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.
-
-// Test instantiation of object with malbounded types.
-
-class A<
-    T
-          extends num //# 01: static type warning
-    > {}
-
-class B<T> implements A<T> {}
-
-class C<
-    T
-          extends num //# 01: continued
-    > implements B<T> {}
-
-class Class<T> {
-  newA() {
-    new A<T>(); //# 01: continued
-  }
-  newB() {
-    new B<T>(); //# 01: continued
-  }
-  newC() {
-    new C<T>(); //# 01: continued
-  }
-}
-
-bool inCheckedMode() {
-  try {
-    var i = 42;
-    String s = i;
-  } on TypeError catch (e) {
-    return true;
-  }
-  return false;
-}
-
-void test(bool expectTypeError, f()) {
-  try {
-    var v = f();
-    if (expectTypeError && inCheckedMode()) {
-      throw 'Missing type error instantiating ${v.runtimeType}';
-    }
-  } on TypeError catch (e) {
-    if (!expectTypeError || !inCheckedMode()) {
-      throw 'Unexpected type error: $e';
-    }
-  }
-}
-
-void main() {
-  test(false, () => new A<int>());
-  test(false, () => new B<int>());
-  test(false, () => new C<int>());
-
-  test(true, () => new A<String>()); //# 01: continued
-  test(true, () => new B<String>()); //# 01: continued
-  test(true, () => new C<String>()); //# 01: continued
-
-  var c = new Class<int>();
-  test(false, () => c.newA());
-  test(false, () => c.newB());
-  test(false, () => c.newC());
-
-  c = new Class<String>();
-  test(true, () => c.newA()); //# 01: continued
-  test(true, () => c.newB()); //# 01: continued
-  test(true, () => c.newC()); //# 01: continued
-}