Add Zone support for Timers.

tests/lib/async/catch_errors11_test.dart

Index: tests/lib/async/catch_errors11_test.dart
diff --git a/tests/lib/async/catch_errors5_test.dart b/tests/lib/async/catch_errors11_test.dart
similarity index 78%
copy from tests/lib/async/catch_errors5_test.dart
copy to tests/lib/async/catch_errors11_test.dart
index 7fea08f0cfdfa33b7e30a01f1f025b569f43c8a1..d16372e6aab81dfe099e4d9fcdf35ae9828578f4 100644
--- a/tests/lib/async/catch_errors5_test.dart
+++ b/tests/lib/async/catch_errors11_test.dart
@@ -8,15 +8,14 @@ import 'dart:isolate';
 
 main() {
   // We keep a ReceivePort open until all tests are done. This way the VM will
-  // time out if the callbacks are not invoked.
+  // hang if the callbacks are not invoked and the test will time out.
   var port = new ReceivePort();
   var events = [];
-  // Test that synchronous *and* asynchronous errors are caught by
-  // `catchErrors`.
+  // Test that `catchErrors` catches errors that are delayed by `Timer.run`.
   catchErrors(() {
     events.add("catch error entry");
     new Future.error("future error");
-    throw "catch error";
+    Timer.run(() { throw "timer error"; });
   }).listen((x) {
       events.add(x);
     },
@@ -24,8 +23,8 @@ main() {
       Expect.listEquals([
                          "catch error entry",
                          "main exit",
-                         "catch error",
                          "future error",
+                         "timer error",
                          ],
                          events);
       port.close();