On this unrelated CL: https://chromium-review.googlesource.com/c/chromium/src/+/1347354/4

network_service_content_browsertests failed multiple times:
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win10_chromium_x64_rel_ng/143365

but succeeded on retry:
https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win10_chromium_x64_rel_ng/143422

"""
DevTools listening on ws://127.0.0.1:64185/devtools/browser/f04f25ee-305d-41c1-b398-076f872a9444
[1392:1336:1121/140256.188:FATAL:network_service.mojom.cc(3385)] Check failed: !connected. NetworkServiceClient::OnClearSiteDataCallback was destroyed without first either being run or its corresponding binding being closed. It is an error to drop response callbacks which still correspond to an open interface pipe.
Backtrace:
	base::debug::StackTrace::StackTrace [0x00007FF7B4C88F94+36]
	logging::LogMessage::~LogMessage [0x00007FF7B4CA2242+98]
	network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder::OnIsConnectedComplete [0x00007FF7B2BAD7D3+147]
	base::OnceCallback<void __cdecl(bool)>::Run [0x00007FF7B249E359+57]
	base::internal::OptionalStorageBase<mojo::DisconnectReason,0>::Init<mojo::DisconnectReason const & __ptr64> [0x00007FF7B4B5D10D+1389]
	base::internal::OptionalStorageBase<mojo::DisconnectReason,0>::Init<mojo::DisconnectReason const & __ptr64> [0x00007FF7B4B5D017+1143]
	network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder::~NetworkServiceClient_OnClearSiteData_ProxyToResponder [0x00007FF7B2BAD6EE+110]
	std::unique_ptr<network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder,std::default_delete<network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder> >::~unique_ptr<network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToRes [0x00007FF7B2BAD575+21]
	base::internal::BindState<void (__cdecl network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder::*)(void) __ptr64,std::unique_ptr<network::mojom::NetworkServiceClient_OnClearSiteData_ProxyToResponder,std::default_delete<network::mojom::Netwo [0x00007FF7B2BAD656+22]
	base::internal::BindState<void (__cdecl*)(base::TimeTicks,std::unique_ptr<content::ClearSiteDataHandler::ConsoleMessagesDelegate,std::default_delete<content::ClearSiteDataHandler::ConsoleMessagesDelegate> >,base::RepeatingCallback<content::WebContents * _ [0x00007FF7B3791B96+54]
	content::ClearSiteDataHandler::ExecuteClearingTask [0x00007FF7B37911CE+894]
	content::ClearSiteDataHandler::Run [0x00007FF7B3790C76+550]
	content::ClearSiteDataHandler::HandleHeaderAndOutputConsoleMessages [0x00007FF7B37904CE+14]
	content::ClearSiteDataHandler::HandleHeader [0x00007FF7B379030B+155]
	content::NetworkServiceClient::OnClearSiteData [0x00007FF7B39F4660+224]
	network::mojom::NetworkServiceClientStubDispatch::AcceptWithResponder [0x00007FF7B2B9EFD8+2072]
	network::mojom::NetworkServiceClientStub<mojo::RawPtrImplRefTraits<network::mojom::NetworkServiceClient> >::AcceptWithResponder [0x00007FF7B2AD091A+58]
	mojo::InterfaceEndpointClient::HandleValidatedMessage [0x00007FF7B4B5B0A1+641]
	mojo::FilterChain::Accept [0x00007FF7B56A95E7+151]
	mojo::InterfaceEndpointClient::HandleIncomingMessage [0x00007FF7B4B5C1DA+122]
	mojo::internal::MultiplexRouter::ProcessIncomingMessage [0x00007FF7B4B60107+727]
	mojo::internal::MultiplexRouter::Accept [0x00007FF7B4B5FC1C+348]
	mojo::FilterChain::Accept [0x00007FF7B56A95E7+151]
	mojo::Connector::ReadSingleMessage [0x00007FF7B4B59024+660]
	mojo::Connector::ReadAllAvailableMessages [0x00007FF7B4B59971+129]
	mojo::Connector::OnHandleReadyInternal [0x00007FF7B4B597D9+137]
	mojo::SimpleWatcher::OnHandleReady [0x00007FF7B4D46FC2+258]
	base::debug::TaskAnnotator::RunTask [0x00007FF7B647223B+347]
	base::MessageLoopImpl::RunTask [0x00007FF7B580D95E+270]
	base::MessageLoopImpl::DoWork [0x00007FF7B580DF97+407]
	base::MessagePumpForUI::DoRunLoop [0x00007FF7B4CAD4E9+169]
	base::MessagePumpWin::Run [0x00007FF7B4CACE3E+78]
	base::MessageLoopImpl::Run [0x00007FF7B580D5DB+139]
	base::RunLoop::Run [0x00007FF7B4CCD099+249]
	base::RunLoop::RunUntilIdle [0x00007FF7B4CCD730+112]
	content::Shell::CloseAllWindows [0x00007FF7B4B45697+119]
	content::ContentBrowserTest::PostRunTestOnMainThread [0x00007FF7B4B01FAF+111]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x00007FF7B4B0D342+946]
	content::ShellBrowserMainParts::PreMainMessageLoopRun [0x00007FF7B568AAFC+76]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x00007FF7B378136E+62]
	content::StartupTaskRunner::RunAllTasksNow [0x00007FF7B3BA5D35+37]
	content::BrowserMainLoop::CreateStartupTasks [0x00007FF7B37801B2+786]
	content::BrowserMainRunnerImpl::Initialize [0x00007FF7B378382B+107]
	ShellBrowserMain [0x00007FF7B802564A+42]
	content::ShellMainDelegate::RunProcess [0x00007FF7B8023F0C+188]
	content::RunBrowserProcessMain [0x00007FF7B36863F9+89]
	content::ContentMainRunnerImpl::Run [0x00007FF7B3686E00+832]
	service_manager::Main [0x00007FF7B51C3CD3+2003]
	content::ContentMain [0x00007FF7B368633E+62]
	content::BrowserTestBase::SetUp [0x00007FF7B4B0CE5A+2218]
	testing::Test::Run [0x00007FF7B336D210+112]
	testing::TestInfo::Run [0x00007FF7B336DBF2+226]
	testing::TestCase::Run [0x00007FF7B336E172+258]
	testing::internal::UnitTestImpl::RunAllTests [0x00007FF7B3375A2E+638]
	testing::UnitTest::Run [0x00007FF7B33756F5+165]
	base::TestSuite::Run [0x00007FF7B4B34816+118]
	content::ContentTestLauncherDelegate::RunTestSuite [0x00007FF7B8022D4A+58]
	content::LaunchTests [0x00007FF7B4B26478+488]
	main [0x00007FF7B8022CEB+75]
	__scrt_common_main_seh [0x00007FF7B855C1E8+268] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283)
	BaseThreadInitThunk [0x00007FFAD5552774+20]
	RtlUserThreadStart [0x00007FFAD5F40D51+33]
"""