Revert "Remove NullPointerException."

tests/language/closure3_test.dart

 // Copyright (c) 2012, 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 that a NoSuchMethodError is thrown even when an expression
+// Test that a NullPointerException is thrown even when an expression
 // seems to be free of side-effects.
 
 test(x, y) {
   (() { x - y; })();
 }
 
 main() {
-  Expect.throws(() { test(null, 2); }, (e) => e is NoSuchMethodError);
+  try {
+    test(null, 2);
+    Expect.fail('Expected NullPointerException');
+  } on NullPointerException catch (ex) {
+    return;
+  }
+  Expect.fail('Expected NullPointerException');
 }