Mark stack_trace/test/trace_test as passing on safari

dart/pkg/pkg.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.
 
 # Don't run any test-like files that show up in packages directories. It
 # shouldn't be necessary to run "pub install" in these packages, but if you do
 # it shouldn't break the tests.
 */packages/*/*: Skip
 */*/packages/*/*: Skip
 */*/*/packages/*/*: Skip
@@ skipping 76 matching lines @@
 intl/test/date_time_format_http_request_test: Skip # Timeout.
 
 [ $runtime == ie9 ]
 intl/test/date_time_format_http_request_test: Fail # Issue 8983
 mime/test/mime_multipart_transformer_test: Skip # No typed_data on IE9.
 collection_helpers/test/typed_buffers_test: Fail, Crash # No typed_data on IE9.
 polymer/test/instance_attrs_test: Pass, Fail # Issue 14167
 
 [ $runtime == safari ]
 fixnum/test/int_64_test: Pass, Fail # Bug in JSC.
-stack_trace/test/trace_test: Fail # http://dartbug.com/12380
 
 # Unexplained errors only occuring on Safari.
 collection_helpers/test/typed_buffers_test: RuntimeError
 
 [ $runtime == ie9 || $runtime == ie10 ]
 polymer/example/canonicalization/test/canonicalization_deploy_test: Pass, Timeout
 polymer/example/canonicalization/test/canonicalization_test: Timeout, OK # tests development only behavior
 polymer/test/attr_deserialize_test: Pass, Timeout # Issue 13260
 polymer/test/attr_mustache_test: Pass, Timeout # Issue 13260
 polymer/test/bind_test: Timeout # Issue 13260
@@ skipping 222 matching lines @@
 unittest/test/mock_test: StaticWarning, OK # testing unimplemented members
 
 [ $runtime == vm && ($system == windows || $system == macos) ]
 watcher/test/*/linux_test: Skip
 
 [ $runtime == vm && ($system == windows || $system == linux) ]
 watcher/test/*/mac_os_test: Skip
 
 [ $runtime == vm && $system == macos ]
 watcher/test/directory_watcher/mac_os_test: Pass, Fail # Issue 15024