Windows (reports 5a6ca03e34994f2a, dc1c3b42f244d780, ebf7d2f63d0e46cb, f555dc0eb011b410, 940f877e6bbdb403, cd35524ee8c8bc0a): These all have SchedulerWorker threads stuck waiting for SafeBrowsing SwReporter sub-process to return.

Sample stack:

0x00007fff45ef5154	(ntdll.dll + 0x000a5154 )	NtWaitForSingleObject
0x00007fff42dfaade	(KERNELBASE.dll + 0x0001aade )	WaitForSingleObjectEx
0x00007ffef30aff7c	(chrome.dll -process_win.cc:176 )	base::Process::WaitForExitWithTimeout(base::TimeDelta,int *)
0x00007ffef30afef2	(chrome.dll -process_win.cc:163 )	base::Process::WaitForExit(int *)
0x00007ffef3cf9144	(chrome.dll -reporter_runner_win.cc:497 )	safe_browsing::`anonymous namespace'::LaunchAndWaitForExitOnBackgroundThread
0x00007ffef1faee6f	(chrome.dll -post_task_and_reply_with_result_internal.h:20 )	base::internal::ReturnAsParamAdapter<PathValidationResult>
0x00007ffef1faee26	(chrome.dll -bind_internal.h:572 )	base::internal::Invoker<base::internal::BindState<void (*)(base::OnceCallback<GoogleUpdateMetricsProviderWin::GoogleUpdateMetrics ()>, GoogleUpdateMetricsProviderWin::GoogleUpdateMetrics *),base::OnceCallback<GoogleUpdateMetricsProviderWin::GoogleUpdateMetrics ()>,GoogleUpdateMetricsProviderWin::GoogleUpdateMetrics *>,void ()>::RunOnce
0x00007ffef30e83b6	(chrome.dll -post_task_and_reply_impl.cc:79 )	base::`anonymous namespace'::PostTaskAndReplyRelay::RunTaskAndPostReply
0x00007ffef30e863f	(chrome.dll -bind_internal.h:572 )	base::internal::Invoker<base::internal::BindState<void (*)(base::(anonymous namespace)::PostTaskAndReplyRelay),base::(anonymous namespace)::PostTaskAndReplyRelay>,void ()>::RunOnce
0x00007ffef1f17114	(chrome.dll -task_annotator.cc:101 )	base::debug::TaskAnnotator::RunTask(char const *,base::PendingTask *)
0x00007ffef1fa9c7b	(chrome.dll -task_tracker.cc:478 )	base::internal::TaskTracker::RunOrSkipTask(base::internal::Task,base::internal::Sequence *,bool)
0x00007ffef1fa9732	(chrome.dll -task_tracker.cc:371 )	base::internal::TaskTracker::RunAndPopNextTask(scoped_refptr<base::internal::Sequence>,base::internal::CanScheduleSequenceObserver *)
0x00007ffef1fa84eb	(chrome.dll -scheduler_worker.cc:85 )	base::internal::SchedulerWorker::Thread::ThreadMain()
0x00007ffef30b5a93	(chrome.dll -platform_thread_win.cc:91 )	base::`anonymous namespace'::ThreadFunc
0x00007fff45208101	(KERNEL32.DLL + 0x00018101 )	BaseThreadInitThunk