Make new language_2 test strong mode compliant.

tests/language_2/generic_methods_generic_function_result_test.dart

 // Copyright (c) 2017, 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.
 //
 // VMOptions=--generic-method-syntax,--error-on-bad-type
 
 // Verify that function type parameter S can be resolved in bar.
 
 import "package:expect/expect.dart";
 
 T foo<T extends num>(int i, T t) => i + t;
 
-List<T Function<T extends num>(S, T)> bar<S extends num>() {
+List<T Function<T extends num>(S, T)> bar<S extends int>() {
   return <T Function<T extends num>(S, T)>[foo, foo];
 }
 
 void main() {
   var list = bar<int>();
   print(list[0]
-      .runtimeType); // "(int, int) => int" when reifying generic functions.
+      .runtimeType); // "<T extends num>(int, T) => T" when reifying generic functions.
   Expect.equals(123, list[1]<int>(100, 23));
 }