AppViewTests/AppViewTest.TestAppViewWithUndefinedDataShouldSucceed/0 is flaky on all builders.

Flakiness dashboard: https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=extensions_browsertests&tests=AppViewTests%2FAppViewTest.TestAppViewWithUndefinedDataShouldSucceed%2F0

Sample failing run: https://build.chromium.org/p/chromium.win/builders/Win%207%20Tests%20x64%20%281%29/builds/17779

Output:

[ RUN      ] AppViewTests/AppViewTest.TestAppViewWithUndefinedDataShouldSucceed/0
[6900:4760:1019/160452:36264756:WARNING:shell_extension_system.cc(61)] Warnings loading extension at e:\s\w\irhojeld\extensions	est\datapp_view/apitest/skeleton:
[6900:4760:1019/160452:36264756:WARNING:shell_extension_system.cc(63)] Unrecognized manifest key 'minimum_chrome_version'.
[6900:4760:1019/160453:36264912:INFO:CONSOLE(20)] "appToEmbed  cnafkodplflchdmpoaaipnkbgpiaimkh", source: chrome-extension://ogpkgnkjcalcngkimcfekojdphndalbh/main.js (20)
[6900:4760:1019/160453:36264912:INFO:CONSOLE(20)] "Attempting to connect to non-existant app.", source: chrome-extension://ogpkgnkjcalcngkimcfekojdphndalbh/main.js (20)
[6900:4760:1019/160453:36264928:INFO:CONSOLE(66)] "Unable to connect to app "abc123".", source: extensions::appView (66)
[6900:4760:1019/160453:36264928:INFO:CONSOLE(20)] "failed to connect to non-existant app.", source: chrome-extension://ogpkgnkjcalcngkimcfekojdphndalbh/main.js (20)
[6900:4760:1019/160453:36264928:INFO:CONSOLE(20)] "attempting to connect to known app.", source: chrome-extension://ogpkgnkjcalcngkimcfekojdphndalbh/main.js (20)
[6900:4760:1019/160453:36265006:INFO:CONSOLE(20)] "Connected.", source: chrome-extension://ogpkgnkjcalcngkimcfekojdphndalbh/main.js (20)
Backtrace:
	extensions::ExtensionWebRequestEventRouter::OnErrorOccurred [0x0000000140C8FF71+73]
	extensions::ShellNetworkDelegate::OnCompleted [0x0000000140D5E9B9+145]
	net::NetworkDelegate::NotifyCompleted [0x000000014128E1FF+219]
	net::URLRequest::NotifyRequestCompleted [0x0000000141278905+61]
	net::URLRequest::DoCancel [0x00000001412780A9+169]
	net::URLRequest::Cancel [0x0000000141277E68+56]
	net::URLRequest::~URLRequest [0x00000001412778EC+40]
	net::URLRequest::`scalar deleting destructor' [0x0000000141277BA0+20]
	content::ResourceLoader::~ResourceLoader [0x0000000140195718+224]
	content::ResourceLoader::`scalar deleting destructor' [0x000000014019591C+20]
	std::_Tree<std::_Tmap_traits<content::GlobalRequestID,std::unique_ptr<content::ResourceLoader,std::default_delete<content::ResourceLoader> >,std::less<content::GlobalRequestID>,std::allocator<std::pair<content::GlobalRequestID const ,std::unique_ptr<conte [0x0000000140194D03+1139]
	content::ResourceDispatcherHostImpl::RemovePendingLoader [0x0000000140191CF9+65]
	content::ResourceDispatcherHostImpl::CancelRequestsForRoute [0x000000014018DBD4+572]
	content::ResourceDispatcherHostImpl::CancelRequestsForProcess [0x000000014018D981+33]
	IPC::ChannelProxy::Context::OnChannelClosed [0x0000000140E8D36E+118]
	base::debug::TaskAnnotator::RunTask [0x0000000140E62F51+353]
	base::MessageLoop::RunTask [0x0000000140DFC687+1367]
	base::MessageLoop::DoWork [0x0000000140DFB6EA+394]
	base::MessagePumpForIO::DoRunLoop [0x0000000140E63F57+327]
	base::MessagePumpWin::Run [0x0000000140E64CE4+84]
	base::RunLoop::Run [0x0000000140DEA09E+46]
	content::BrowserThreadImpl::IOThreadRun [0x0000000140036512+46]
	content::BrowserThreadImpl::Run [0x0000000140036E8D+333]
	base::Thread::ThreadMain [0x0000000140E41552+418]
	base::PlatformThread::Sleep [0x0000000140E11A9A+474]
	BaseThreadInitThunk [0x00000000775259BD+13]
	RtlUserThreadStart [0x000000007765A2E1+33]

Earliest failing run I saw on the dashboard was associated with the range https://test-results.appspot.com/revision_range?start=426291&end=426304 .  Tentatively assigning to steel@ who touched extension test stuff in that range, not because I suspect this CL, but in hopes of better triage.