Fix for dart2js codegen issue 22487

tests/compiler/dart2js_extra/22487_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.
 
-import 'dart:math' as Math;
+// Regression test for http://dartbug.com/22487
+
 import 'package:expect/expect.dart';
 
+divIsInt(a, b) => (a / b) is int;
+
 main() {
-  Expect.equals(4, new C().m());
+  Expect.isFalse((divIsInt)(10, 3));
 }
-
-class C {
-  max(a) => a;
-
-  m() {
-    return max(Math.max(2, 4));
-  }
-}