TSAN bot failure in MessagePumpLibevent::Run

tools/valgrind/tsan/suppressions.txt

 # There are a few kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 664 matching lines @@
   fun:webrtc::TracePosix::AddTime
   fun:webrtc::TraceImpl::AddImpl
   fun:webrtc::Trace::Add
   fun:webrtc::ThreadPosix::Run
 }
 {
   bug_103711f
   ThreadSanitizer:Race
   fun:WebRTCAudioDeviceTest::SetUp
 }
+{
+   bug_104769
+   ThreadSanitizer:Race
+   fun:timeout_correct
+   fun:event_base_loop
+   fun:base::MessagePumpLibevent::Run
+   fun:MessageLoop::RunInternal
+   fun:MessageLoop::RunHandler
+   fun:MessageLoop::Run
+}