Expose Zones.

tests/lib/async/run_zoned9_test.dart

Index: tests/lib/async/run_zoned9_test.dart
diff --git a/tests/lib/async/run_zoned9_test.dart b/tests/lib/async/run_zoned9_test.dart
index ab0f5ab17c0712fb6400aff5062e0cf7b653518d..fab0da38a43590b9e7f9cef5abacc2aebc09b793 100644
--- a/tests/lib/async/run_zoned9_test.dart
+++ b/tests/lib/async/run_zoned9_test.dart
@@ -12,13 +12,13 @@ main() {
   // to the next runZonedExperimental when the handler returns false.
   bool sawInnerHandler = false;
   try {
-    runZonedExperimental(() {
-      runZonedExperimental(() { throw 0; },
-                          onError: (e) {
-                            Expect.equals(0, e);
-                            sawInnerHandler = true;
-                            throw e;
-                          });
+    runZoned(() {
+      runZoned(() { throw 0; },
+               onError: (e) {
+                 Expect.equals(0, e);
+                 sawInnerHandler = true;
+                 throw e;
+               });
     }, onError: (e) {
       Expect.equals(0, e);
       Expect.isTrue(sawInnerHandler);