OS: Mac
Test suite: browser_tests
Test: IndependentOTRProfileManagerTest.DeleteImmediatelyWhenBrowsersAlreadyClosed

Example failure build: https://ci.chromium.org/buildbot/chromium.fyi/Chromium%20Mac%2010.13/2841

Failure:
../../chrome/browser/media/router/presentation/independent_otr_profile_manager_browsertest.cc:205: Failure
Value of: base::ContainsValue(*BrowserList::GetInstance(), otr_browser2)
  Actual: true
Expected: false
Stack trace:
0   browser_tests                       0x000000010648245b testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop(int) + 91
1   browser_tests                       0x0000000106481e19 testing::internal::AssertHelper::operator=(testing::Message const&) const + 89
2   browser_tests                       0x000000010520b5fd IndependentOTRProfileManagerTest_DeleteImmediatelyWhenBrowsersAlreadyClosed_Test::RunTestOnMainThread() + 1357
3   browser_tests                       0x0000000108818643 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop() + 515
4   browser_tests                       0x000000010833d819 ChromeBrowserMainParts::PreMainMessageLoopRunImpl() + 4233
5   browser_tests                       0x000000010833c68e ChromeBrowserMainParts::PreMainMessageLoopRun() + 62
6   browser_tests                       0x0000000106f2d303 content::BrowserMainLoop::PreMainMessageLoopRun() + 67
7   browser_tests                       0x00000001072efb57 content::StartupTaskRunner::RunAllTasksNow() + 39
8   browser_tests                       0x0000000106f2bedd content::BrowserMainLoop::CreateStartupTasks() + 813
9   browser_tests                       0x0000000106f2f4c2 content::BrowserMainRunnerImpl::Initialize(content::MainFunctionParams const&, std::__1::unique_ptr<content::BrowserProcessSubThread, std::__1::default_delete<content::BrowserProcessSubThread> >) + 98
10  browser_tests                       0x0000000106f29f8c content::BrowserMain(content::MainFunctionParams const&, std::__1::unique_ptr<content::BrowserProcessSubThread, std::__1::default_delete<content::BrowserProcessSubThread> >) + 204
11  browser_tests                       0x0000000108180aa8 content::ContentMainRunnerImpl::Run() + 616
12  browser_tests                       0x0000000109d49434 service_manager::Main(service_manager::MainParams const&) + 2708
13  browser_tests                       0x000000010817faa4 content::ContentMain(content::ContentMainParams const&) + 68
14  browser_tests                       0x000000010881825e content::BrowserTestBase::SetUp() + 2574
15  browser_tests                       0x00000001082c4348 InProcessBrowserTest::SetUp() + 536

There was the odd non-viz flake a while back on flakiness dashboard. However those builds were too old and logs were gone.

Seems to fail with viz >10% of the time.

From the stack trace it looks like a missing browser. So it may not be viz related, but the timing changes we cause could be exposing the flake. Could you take a look and help triage?