Add test for calling an empty function from unloaded deferred library.

tests/language/deferred_call_empty_before_load_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.
 
-// Regression test for http://dartbug.com/22776/
+// Test that calling a function, even though it itself has no effect, will
+// trigger an error if the corresponding deferred library has not been loaded.
 
 import "package:expect/expect.dart";
-
-class A {}
+import "deferred_call_empty_before_load_lib.dart" deferred as lib1;
 
 main() {
-  try {
-    print(id(new Duration(milliseconds: 10)));
-    print(id(3) ~/ new A());
-  } catch (e) {
-    print("Error '$e' ${e.runtimeType}");
-  }
+  Expect.throws(() => lib1.thefun());
 }
-
-@AssumeDynamic()
-@NoInline()
-id(x) => x;
-