Mark timer test as flaky on IE9.

tests/lib/lib.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.
 
 [ $csp ]
 mirrors/delegate_test: RuntimeError # Issue 13864
 
 [ $compiler == dart2js ]
 async/schedule_microtask6_test: RuntimeError # global error handling is not supported. http://dartbug.com/5958
 
@@ skipping 124 matching lines @@
 async/schedule_microtask6_test: Fail             # Issue 10957 - may be related to issue 10910
 
 [ $compiler == dart2dart && $minified ]
 json/json_test: Fail                            # Issue 10961
 
 [ $compiler == dart2js && $minified ]
 mirrors/typedef_test/01: Fail # http://dartbug.com/6490
 
 [ $runtime == ff ]
 # FF setTimeout can fire early: https://bugzilla.mozilla.org/show_bug.cgi?id=291386
-async/multiple_timer_test: Pass, Fail
-async/timer_isolate_test: Pass, Fail
-async/timer_test: Pass, Fail
+async/multiple_timer_test: Pass, Fail # Issue 14734
+async/timer_isolate_test: Pass, Fail # Issue 14734
+async/timer_test: Pass, Fail # Issue 14734
 convert/chunked_conversion_utf88_test: Pass, Timeout  # Issue 12029
 convert/streamed_conversion_utf8_encode_test: Pass, Timeout  # Issue 12029
 convert/streamed_conversion_utf8_decode_test: Pass, Slow  # Issue 12029
 
 [ $runtime == ie9 ]
 # IE9 doesn't support typed arrays.
 typed_data/*: Fail # Issue 11971
 convert/chunked_conversion_utf88_test: Pass, Slow, Timeout  # Issue 12029
 convert/streamed_conversion_json_utf8_decode_test: Pass, Timeout # Issue 12029
 async/deferred/deferred_api_test: Pass, Timeout # http://dartbug.com/12635
 convert/streamed_conversion_utf8_decode_test: Pass, Timeout # http://dartbug.com/12768
 convert/utf85_test: Skip # Issue 12029.
+async/timer_isolate_test: Pass, Fail # Issue 14734
 
 [ $compiler == dart2js ]
 typed_data/typed_data_hierarchy_int64_test: RuntimeError # Issue 10275
 
 [ $runtime == opera ]
-async/multiple_timer_test: Pass, Fail
+async/multiple_timer_test: Pass, Fail # Probably issue 14734
 
 [ $runtime == opera && $system == windows]
 # TODO(efortuna): Investigate.
 async/timer_test: Fail, Pass
 
 [ $runtime == vm ]
 async/timer_not_available_test: Fail, OK
 mirrors/native_class_test: Fail, OK # This test is meant to run in a browser.
 
 [ $compiler == none  ]
@@ skipping 103 matching lines @@
 mirrors/operator_test: StaticWarning, OK # API being removed.
 mirrors/parameter_metadata_test: StaticWarning, OK # API being removed.
 mirrors/parameter_test/01: StaticWarning, OK # API being removed.
 mirrors/parameter_test/none: StaticWarning, OK # API being removed.
 mirrors/reflect_runtime_type_test: StaticWarning, OK # API being removed.
 mirrors/reflect_uninstantiated_class_test: StaticWarning, OK # API being removed.
 mirrors/regress_14304_test: StaticWarning, OK # API being removed.
 mirrors/return_type_test: StaticWarning, OK # API being removed.
 mirrors/static_test: StaticWarning, OK # API being removed.
 mirrors/to_string_test: StaticWarning, OK # API being removed.