test rename overhaul: step 8 - language tests

tests/language/src/Operator4Test.dart

-// Copyright (c) 2011, 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 A {
-  operator <(other) => 1;
-}
-
-// This triggered a bug in Dart2Js: relational operators were not correctly
-// boolified.
-foo(a) {
-  try {
-    if (a < a) {
-      return "bad";
-    } else {
-      return 499;
-    }
-  } catch(TypeError e) {
-    return 499;
-  }
-}
-
-main() {
-  Expect.equals(499, foo(new A()));
-}