All BookmarkAppNavigationThrottleExperimentalLinkBrowserTest tests flake a little bit (notice the grey timeout squares):
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=BookmarkAppNavigationThrottleExperimentalLinkBrowserTest.AppUrlBlank

These tests are actually new so we should fix this flakiness asap.

Example failure:
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20ASan%20Tests%20%28sandboxed%29/48757

ortuno@chromium.org, can you triage this?

Oops, I wrote "timeout" failures but I should have written "crash". These tests occasionally crash.

Here's an example crash:
[ RUN      ] BookmarkAppNavigationThrottleExperimentalLinkBrowserTest.AppUrlBlank/0
[5944:4664:0709/144004.843:WARNING:discovery_network_list_win.cc(195)] Failed to open Wlan client handle: 1062
[5944:5468:0709/144005.062:WARNING:chrome_browser_main_win.cc(653)] Command line too long for RegisterApplicationRestart:  --brave-new-test-launcher --cfi-diag=0 --gtest_also_run_disabled_tests --gtest_filter=BookmarkAppNavigationThrottleExperimentalLinkBrowserTest.AppUrlBlank/0 --single_process --test-launcher-bot-mode --test-launcher-output="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir2924_4642\results2924_18680\test_results.xml" --test-launcher-summary-output="e:\b\s\w\iopdgynr\output.json" --user-data-dir="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir2924_4642\d2924_12120" --disable-offline-auto-reload --use-mock-cert-verifier-for-testing --no-first-run --no-default-browser-check --enable-logging=stderr --disable-default-apps --wm-window-animations-disabled --disable-component-update --test-type=browser --force-color-profile=srgb --disable-zero-browsers-open-for-tests --ipc-connection-timeout=45 --allow-file-access-from-files --dom-automation --log-gpu-control-list-decisions --disable-backgrounding-occluded-windows --disable-gl-drawing-for-tests --override-use-software-gl-for-tests --force-color-profile=srgb --disable-compositor-ukm-for-tests --enable-features=DesktopPWAWindowing,DesktopPWAsLinkCapturing,TestFeatureForBrowserTest1 --disable-features=NetworkPrediction,SpeculativePreconnect,TestFeatureForBrowserTest2 --flag-switches-begin --flag-switches-end --restore-last-session about:blank
[5092:5720:0709/144005.323:INFO:media_foundation_video_encode_accelerator_win.cc(353)] Windows versions earlier than 8 are not supported.
[5944:5468:0709/144007.046:WARNING:gaia_auth_fetcher.cc(902)] Could not reach Google Accounts servers: errno -11
[5944:5468:0709/144007.932:WARNING:gaia_auth_fetcher.cc(902)] Could not reach Google Accounts servers: errno -11
[5944:5468:0709/144013.057:WARNING:gaia_auth_fetcher.cc(902)] Could not reach Google Accounts servers: errno -102
../../chrome/browser/extensions/bookmark_app_navigation_browsertest.cc(408): error: Expected: (browser()) != (chrome::FindLastActive()), actual: 1441B7E8 vs 1441B7E8
Stack trace:
Backtrace:
	StackTraceGetter::CurrentStackTrace [0x02A98E8A+90]
	testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x02AAFC2A+74]
	testing::internal::AssertHelper::operator= [0x02AAF73B+75]
	extensions::test::BookmarkAppNavigationBrowserTest::TestTabActionOpensAppWindow [0x01FE45F5+965]
	extensions::test::BookmarkAppNavigationThrottleExperimentalLinkBrowserTest_AppUrlBlank_Test::RunTestOnMainThread [0x01FEBC4C+460]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x052053A4+804]
	??$Invoke@P8BrowserTestBase@content@@AEXXZPAV12@$$V@?$FunctorTraits@P8BrowserTestBase@content@@AEXXZX@internal@base@@SAXP8BrowserTestBase@content@@AEXXZ$$QAPAV34@@Z [0x052072CC+28]
	base::internal::InvokeHelper<0,void>::MakeItSo<void (__thiscall content::BrowserTestBase::*const &)(void),content::BrowserTestBase *> [0x0520720F+79]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::RunImpl<void (__thiscall content::BrowserTestBase::*const &)(void),std [0x052071A5+85]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::Run [0x0520709F+63]
	base::RepeatingCallback<void __cdecl(void)>::Run [0x00960CB2+50]
	ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x0732C3CF+7071]
	ChromeBrowserMainParts::PreMainMessageLoopRun [0x0732A7AE+398]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x5FE95386+342]
	??$Invoke@P8BrowserMainLoop@content@@AEHXZPAV12@$$V@?$FunctorTraits@P8BrowserMainLoop@content@@AEHXZX@internal@base@@SAHP8BrowserMainLoop@content@@AEHXZ$$QAPAV34@@Z [0x5FE9F41C+28]
	base::internal::InvokeHelper<0,int>::MakeItSo<int (__thiscall content::BrowserMainLoop::*const &)(void),content::BrowserMainLoop *> [0x5FE9F34F+79]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::RunImpl<int (__thiscall content::BrowserMainLoop::*const &)(void),std::t [0x5FE9F2E5+85]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::Run [0x5FE9F19F+63]
	base::RepeatingCallback<int __cdecl(void)>::Run [0x60814302+50]
	content::StartupTaskRunner::RunAllTasksNow [0x6114B739+137]
	content::BrowserMainLoop::CreateStartupTasks [0x5FE930B5+1493]
	content::BrowserMainRunnerImpl::Initialize [0x5FEA51EF+1983]
	content::BrowserMain [0x5FE8C819+265]
	content::RunBrowserProcessMain [0x628315CD+365]
	content::ContentMainRunnerImpl::Run [0x62832787+791]
	content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x6282EE61+33]
	service_manager::Main [0x5C9D37B2+1538]
	content::ContentMain [0x628313DC+92]
	content::BrowserTestBase::SetUp [0x05204D61+2913]
	InProcessBrowserTest::SetUp [0x050BD776+2086]
	extensions::ExtensionBrowserTest::SetUp [0x020EC81F+111]
	extensions::test::BookmarkAppNavigationBrowserTest::SetUp [0x01FE1A5C+204]
	extensions::test::BookmarkAppNavigationThrottleExperimentalBrowserTest::SetUp [0x01FFB659+217]
../../chrome/browser/extensions/bookmark_app_navigation_browsertest.cc(414): error: Expected equality of these values:
  target_url
    Which is: https://app.com:62949/in_scope/index.html
  chrome::FindLastActive() ->tab_strip_model() ->GetActiveWebContents() ->GetLastCommittedURL()
    Which is: https://launching-page.com:62949/index.html
Stack trace:
Backtrace:
	StackTraceGetter::CurrentStackTrace [0x02A98E8A+90]
	testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x02AAFC2A+74]
	testing::internal::AssertHelper::operator= [0x02AAF73B+75]
	extensions::test::BookmarkAppNavigationBrowserTest::TestTabActionOpensAppWindow [0x01FE47C9+1433]
	extensions::test::BookmarkAppNavigationThrottleExperimentalLinkBrowserTest_AppUrlBlank_Test::RunTestOnMainThread [0x01FEBC4C+460]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x052053A4+804]
	??$Invoke@P8BrowserTestBase@content@@AEXXZPAV12@$$V@?$FunctorTraits@P8BrowserTestBase@content@@AEXXZX@internal@base@@SAXP8BrowserTestBase@content@@AEXXZ$$QAPAV34@@Z [0x052072CC+28]
	base::internal::InvokeHelper<0,void>::MakeItSo<void (__thiscall content::BrowserTestBase::*const &)(void),content::BrowserTestBase *> [0x0520720F+79]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::RunImpl<void (__thiscall content::BrowserTestBase::*const &)(void),std [0x052071A5+85]
	base::internal::Invoker<base::internal::BindState<void (__thiscall content::BrowserTestBase::*)(void),base::internal::UnretainedWrapper<content::BrowserTestBase> >,void __cdecl(void)>::Run [0x0520709F+63]
	base::RepeatingCallback<void __cdecl(void)>::Run [0x00960CB2+50]
	ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x0732C3CF+7071]
	ChromeBrowserMainParts::PreMainMessageLoopRun [0x0732A7AE+398]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x5FE95386+342]
	??$Invoke@P8BrowserMainLoop@content@@AEHXZPAV12@$$V@?$FunctorTraits@P8BrowserMainLoop@content@@AEHXZX@internal@base@@SAHP8BrowserMainLoop@content@@AEHXZ$$QAPAV34@@Z [0x5FE9F41C+28]
	base::internal::InvokeHelper<0,int>::MakeItSo<int (__thiscall content::BrowserMainLoop::*const &)(void),content::BrowserMainLoop *> [0x5FE9F34F+79]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::RunImpl<int (__thiscall content::BrowserMainLoop::*const &)(void),std::t [0x5FE9F2E5+85]
	base::internal::Invoker<base::internal::BindState<int (__thiscall content::BrowserMainLoop::*)(void),base::internal::UnretainedWrapper<content::BrowserMainLoop> >,int __cdecl(void)>::Run [0x5FE9F19F+63]
	base::RepeatingCallback<int __cdecl(void)>::Run [0x60814302+50]
	content::StartupTaskRunner::RunAllTasksNow [0x6114B739+137]
	content::BrowserMainLoop::CreateStartupTasks [0x5FE930B5+1493]
	content::BrowserMainRunnerImpl::Initialize [0x5FEA51EF+1983]
	content::BrowserMain [0x5FE8C819+265]
	content::RunBrowserProcessMain [0x628315CD+365]
	content::ContentMainRunnerImpl::Run [0x62832787+791]
	content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x6282EE61+33]
	service_manager::Main [0x5C9D37B2+1538]
	content::ContentMain [0x628313DC+92]
	content::BrowserTestBase::SetUp [0x05204D61+2913]
	InProcessBrowserTest::SetUp [0x050BD776+2086]
	extensions::ExtensionBrowserTest::SetUp [0x020EC81F+111]
	extensions::test::BookmarkAppNavigationBrowserTest::SetUp [0x01FE1A5C+204]
	extensions::test::BookmarkAppNavigationThrottleExperimentalBrowserTest::SetUp [0x01FFB659+217]
[5944:4684:0709/144015.241:ERROR:ssl_server_socket_impl.cc(676)] handshake failed; returned -1, SSL error code 1, net_error -100
[5944:4696:0709/144015.312:WARNING:discardable_shared_memory_manager.cc(431)] Some MojoDiscardableSharedMemoryManagerImpls are still alive. They will be leaked.
[5944:5468:0709/144015.322:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[5944:5468:0709/144015.323:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[  FAILED  ] BookmarkAppNavigationThrottleExperimentalLinkBrowserTest.AppUrlBlank/0, where GetParam() = "" (12811 ms)

Link to latest crashing run: https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Win7%20Tests%20%28dbg%29%281%29/70214

Thanks for the links!