Add Zone support for Timers.

tests/lib/async/catch_errors7_test.dart

Index: tests/lib/async/catch_errors7_test.dart
diff --git a/tests/lib/async/catch_errors7_test.dart b/tests/lib/async/catch_errors7_test.dart
index 398a3c57e9c7e283b1e37532c6be75606a930e9f..b7561833935e322df086a79b0a7f19ddc42a2079 100644
--- a/tests/lib/async/catch_errors7_test.dart
+++ b/tests/lib/async/catch_errors7_test.dart
@@ -8,7 +8,7 @@ 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 asynchronous errors are caught.
@@ -22,13 +22,13 @@ main() {
       events.add(x);
     },
     onDone: () {
-      Expect.listEquals([
-            "catch error entry",
-            "main exit",
-            "catch error",
-            "future error",
-            "future error2",
-            499,
+      Expect.listEquals(
+          ["catch error entry",
+           "main exit",
+           "catch error",
+           "future error",
+           "future error2",
+           499,
           ],
           events);
       port.close();