Mark spawnFunction tests as Fail on Dartium

tests/isolate/isolate.status

Index: tests/isolate/isolate.status
diff --git a/tests/isolate/isolate.status b/tests/isolate/isolate.status
index 50b8d2a8dcae80b426005ee5d4be0e3d9c5f36cb..f6a6dc7376f6365a4ae7882f6235f190bfc34784 100644
--- a/tests/isolate/isolate.status
+++ b/tests/isolate/isolate.status
@@ -108,3 +108,33 @@ global_error_handler2_test: Fail # Issue 13719: Please triage this failure.
 global_error_handler_stream2_test: Fail # Issue 13719: Please triage this failure.
 nested_spawn_stream2_test: Fail # Issue 13719: Please triage this failure.
 
+[ $compiler == none && ($runtime == drt || $runtme == dartium) ]
+# Issue 13921: spawnFunction is not allowed on Dartium's DOM thread.
+browser/compute_this_script_browser_stream_test: Fail
+browser/compute_this_script_browser_test: Fail
+count_stream_test: Fail
+count_test: Fail
+cross_isolate_message_test: Fail
+global_error_handler2_test: Fail
+global_error_handler_stream2_test: Fail
+global_error_handler_stream_test: Fail
+global_error_handler_test: Fail
+illegal_msg_stream_test: Fail
+illegal_msg_test: Fail
+isolate_complex_messages_stream_test: Fail
+isolate_complex_messages_test: Fail
+mandel_isolate_stream_test: Fail
+mandel_isolate_test: Fail
+message2_test: Fail
+message_stream2_test: Fail
+message_stream_test: Fail
+message_test: Fail
+mint_maker_test: Fail
+nested_spawn2_test: Fail
+nested_spawn_stream_test: Fail
+nested_spawn_test: Fail
+request_reply_test: Fail
+spawn_function_custom_class_test: Fail
+spawn_function_test: Fail
+stacktrace_message_test: Fail
+unresolved_ports_test: Fail