Mark isolate2_negative_test as flaky.

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 ]
 isolate2_negative_test: Skip  # Need to resolve correct behaviour.
 isolate3_negative_test: Skip  # test depends on isolate error exiting process.
 serialization_test: Skip  # tests dart2js-specific serialization code
 spawn_uri_test: Fail, OK # test uses a ".js" suffix that is bogus on vm.
 compute_this_script_browser_test: Skip # browser specific test
@@ skipping 72 matching lines @@
 *: Skip
 
 [ $compiler == dart2js && $browser ]
 spawn_uri_test: Skip # dart2js does not support spawnUri yet
 spawn_uri_negative_test: Skip # ditto
 spawn_uri_vm_test: Skip # test uses a ".dart" suffix that only works in vm.
 spawn_uri_vm_negative_test: Skip # ditto above.
 timer_not_available_test: Fail, OK # only meant to test when there is no way to
                                    # implement timer (currently only in d8)
 
 [ $compiler == dart2js && ($runtime == drt || $runtime == chrome || ($runtime == ff && $system == linux)) ]

[ngeoffray, 2013/01/16 08:56:50]

Actually I'm not even sure about this line. You can remove it and let the fail,
pass be under [ $compiler == dart2js && $browser ].

[floitsch, 2013/01/16 09:03:37]

Done.

-isolate2_negative_test: Fail # Issue 7769
+isolate2_negative_test: Fail, Pass # Issue 7769
 
 [ $compiler == dart2js && $jscl ]
 multiple_timer_test: Fail,OK # Needs Timer to run.
 spawn_uri_negative_test: Pass # for the wrong reasons (not supported in d8)
 spawn_uri_test: Fail, OK # loading another file is not supported in d8
 spawn_uri_vm_negative_test: Skip # ditto above.
 spawn_uri_vm_test: Skip # test uses a ".dart" suffix that only works in vm.
 timer_cancel_test: Fail,OK # Needs Timer to run.
 timer_cancel1_test: Fail,OK # Needs Timer to run.
 timer_cancel2_test: Fail,OK # Needs Timer to run.
 timer_isolate_test: Fail, OK # Needs Timer to run.
 timer_repeat_test: Fail,OK # Needs Timer to run.
 timer_test: Fail,OK # Needs Timer to run.
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
 
 [ $compiler == dart2dart ]
 # Skip until we stabilize language tests.
 *: Skip
 
 # TODO(ajohnsen): Fix this as part of library changes.
 [ $compiler == none ]
 isolate_negative_test: Skip # Bug 6890