Only expect the polling test to time out on the VM.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index b4630de17ed27caaa7fb3408c8d2432cfb77a3c5..e0f86c1dc7a6d6174fff41d7c30cd32c752bc48e 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -17,8 +17,6 @@ polymer/example/scoped_style/*: Skip
 scheduled_test/test/scheduled_server_test: Pass, Fail # 13524
 scheduled_test/test/scheduled_process_test: Pass, Slow # Issue 9231
 
-watcher/test/directory_watcher/polling_test: Timeout # Issue 16023
-
 polymer/test/event_path_test: Pass, Fail # Issue 15766
 
 # Skip test not runnable via test.dart
@@ -29,6 +27,9 @@ http/test/http_test: Pass, RuntimeError # Issue 15652
 
 third_party/angular_tests/*: Skip # Issue 15955
 
+[ $runtime == vm ]
+watcher/test/directory_watcher/polling_test: Timeout # Issue 16023
+
 [ $compiler == dart2js ]
 collection/test/equality_test/01: Fail # Issue 1533
 collection/test/equality_test/02: Fail # Issue 1533