Make isolate tests work on drt (and hopefully dartium).

tests/isolate/isolate.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 [ $runtime == vm ]
 browser/*: SkipByDesign  # Browser specific tests
 isolate_stress_test: Fail # Issue 12588: This should be able to pass when we have wrapper-less tests.
 
 [ $compiler == none ]
 serialization_test: SkipByDesign # Tests dart2js-specific serialization code
@@ skipping 74 matching lines @@
 spawn_uri_test: Fail # http://dartbug.com/13454
 
 [ $jscl || $runtime == ie9 ]
 spawn_uri_multi_test/none: RuntimeError # http://dartbug.com/13544
 
 [ $compiler == none && $runtime == dartium ]
 spawn_uri_nested_vm_test: Skip # Issue 14479: This test is timing out.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 # Issue 13921: spawnFunction is not allowed on Dartium's DOM thread.
-browser/compute_this_script_browser_test: Fail
-browser/typed_data_message_test: Skip # 13961
-count_test: Fail
-cross_isolate_message_test: Fail
-illegal_msg_function_test: Fail
-illegal_msg_mirror_test: Fail
-isolate_complex_messages_test: Fail
-isolate_stress_test: Fail
-mandel_isolate_test: Fail
-message2_test: Fail
-message_test: Fail
-mint_maker_test: Fail
-nested_spawn2_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
+#browser/compute_this_script_browser_test: Fail
+#browser/typed_data_message_test: Skip # 13961
+#count_test: Fail
+#cross_isolate_message_test: Fail
+#illegal_msg_function_test: Fail
+#illegal_msg_mirror_test: Fail
+#isolate_complex_messages_test: Fail
+#isolate_stress_test: Fail
+#mandel_isolate_test: Fail
+#message2_test: Fail
+#message_test: Fail
+#mint_maker_test: Fail
+#nested_spawn2_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
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 browser/typed_data_message_test: StaticWarning
 isolate3_negative_test: CompileTimeError
 isolate_import_negative_test: CompileTimeError
 mint_maker_test: StaticWarning
 serialization_test: StaticWarning
 unresolved_ports_test: StaticWarning