AutofillPrivateApiTest.GetCountryList and AutofillPrivateApiTest.RemoveEntry have been flaky recently.

Here are examples of the failures:

https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_rel_ng/builds/272286/steps/browser_tests%20%28with%20patch%29%20on%20Windows-7-SP1/logs/AutofillPrivateApiTest.GetCountryList

AutofillPrivateApiTest.GetCountryList (run #1):
[ RUN      ] AutofillPrivateApiTest.GetCountryList
[7868:5140:0831/113457:INFO:CONSOLE(0)] "[FAIL] getCountryList: Expected more than one country
Error
    at Function.captureStackTrace (<anonymous>)
    at Object.<anonymous> (extensions::test:106:11)
    at Object.handleRequest (extensions::binding:63:27)
    at Object.<anonymous> (extensions::binding:422:32)
    at Object.<anonymous> (extensions::test:151:18)
    at Object.handleRequest (extensions::binding:63:27)
    at Object.<anonymous> (extensions::binding:422:32)
    at Object.<anonymous> (extensions::test:135:16)
    at Object.handleRequest (extensions::binding:63:27)
    at Object.<anonymous> (extensions::binding:422:32)", source: chrome-extension://epcifkihnkjgphfkloaaleeakhpmgdmn/main.html?getCountryList (0)
e:\c\win\src\chromerowser\extensionspiutofill_privateutofill_private_apitest.cc(52): error: Value of: RunAutofillSubtest("getCountryList")
  Actual: false
Expected: true
Failed 1 of 1 tests
[7868:5140:0831/113459:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
[  FAILED  ] AutofillPrivateApiTest.GetCountryList, where TypeParam =  and GetParam() =  (2340 ms)

and

https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/285367/steps/browser_tests%20%28with%20patch%29%20on%20Windows-7-SP1/logs/AutofillPrivateApiTest.RemoveEntry

AutofillPrivateApiTest.RemoveEntry (run #1):
[ RUN      ] AutofillPrivateApiTest.RemoveEntry
[4552:5916:0831/164325:FATAL:autofill_private_api.cc(507)] Check failed: personal_data && personal_data->IsDataLoaded().
Backtrace:
	base::debug::StackTrace::StackTrace [0x026A4F87+23]
	logging::LogMessage::~LogMessage [0x0265BE11+49]
	extensions::AutofillPrivateGetCreditCardListFunction::Run [0x051123D6+112]
	ExtensionFunction::RunWithValidation [0x024F1467+249]
	extensions::ExtensionFunctionDispatcher::DispatchWithCallbackInternal [0x024F2FF0+715]
	extensions::ExtensionFunctionDispatcher::Dispatch [0x024F28FD+189]
	extensions::ExtensionWebContentsObserver::OnRequest [0x02505743+37]
	IPC::MessageT<ExtensionHostMsg_Request_Meta,std::tuple<ExtensionHostMsg_Request_Params>,void>::Dispatch<extensions::ExtensionWebContentsObserver,extensions::ExtensionWebContentsObserver,content::RenderFrameHost,void (__thiscall extensions::ExtensionWebCon [0x02505035+262]
	extensions::ExtensionWebContentsObserver::OnMessageReceived [0x02505701+94]
	extensions::ChromeExtensionWebContentsObserver::OnMessageReceived [0x03999111+22]
	content::WebContentsImpl::OnMessageReceived [0x02279935+173]
	content::WebContentsImpl::OnMessageReceived [0x0227A358+19]
	content::RenderFrameHostImpl::OnMessageReceived [0x020D2191+119]
	content::RenderProcessHostImpl::OnMessageReceived [0x021D9A4F+591]
	IPC::ChannelProxy::Context::OnDispatchMessage [0x0324953F+29]
	base::internal::Invoker<base::internal::BindState<base::internal::IgnoreResultHelper<bool (__thiscall content::UtilityProcessHostClient::*)(IPC::Message const &)>,scoped_refptr<content::UtilityProcessHostClient>,IPC::Message>,void __cdecl(void)>::Run [0x029DC33B+21]
	base::debug::TaskAnnotator::RunTask [0x026D0080+256]
	base::MessageLoop::RunTask [0x0266B41B+1211]
	base::MessageLoop::DoWork [0x0266A64E+606]
	base::MessagePumpForUI::DoRunLoop [0x026D13BA+90]
	base::MessagePumpWin::Run [0x026D209A+74]
	base::MessageLoop::RunHandler [0x0266AF57+103]
	base::RunLoop::Run [0x0266D939+41]
	content::RunThisRunLoop [0x02A5663A+49]
	content::MessageLoopRunner::Run [0x02A563B3+105]
	ui_test_utils::NavigateToURLWithDispositionBlockUntilNavigationsComplete [0x026F472E+725]
	ui_test_utils::NavigateToURL [0x026F441F+20]
	ExtensionApiTest::RunExtensionTestImpl [0x015FA089+651]
	ExtensionApiTest::RunExtensionSubtest [0x015F9D53+112]
	testing::internal::TestFactoryImpl<extensions::AutofillPrivateApiTest_ValidatePhoneNumbers_Test>::CreateTest [0x011DEA74+121]
	extensions::AutofillPrivateApiTest_RemoveEntry_Test::RunTestOnMainThread [0x011DEC95+48]
	InProcessBrowserTest::RunTestOnMainThreadLoop [0x026F32FC+180]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x02A5CE37+175]
	ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x0292816B+3287]
	ChromeBrowserMainParts::PreMainMessageLoopRun [0x0292745C+164]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x0203AA9C+112]
	content::StartupTaskRunner::RunAllTasksNow [0x02257F9A+27]
	content::BrowserMainLoop::CreateStartupTasks [0x02038E75+387]
	content::BrowserMainRunnerImpl::Initialize [0x0203BD17+632]
	content::BrowserMain [0x02037A27+117]
	content::RunNamedProcessTypeMain [0x02647B1D+206]
	content::ContentMainRunnerImpl::Run [0x02647A1E+274]
	content::ContentMain [0x02646DEA+35]
	content::BrowserTestBase::SetUp [0x02A5D473+967]
	InProcessBrowserTest::SetUp [0x026F366E+268]
	testing::internal::HandleExceptionsInMethodIfSupported<testing::TestCase,void> [0x02ED4F65+32]
	testing::Test::Run [0x02EDBCC2+51]
	testing::TestCase::Run [0x02EDBD98+133]
	testing::internal::UnitTestImpl::RunAllTests [0x02EDC118+434]
	testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl,bool> [0x02ED4FA9+32]
	testing::UnitTest::Run [0x02EDBF41+133]
	base::TestSuite::Run [0x026FBEBE+95]
	ChromeTestSuiteRunner::RunTestSuite [0x04D4517E+40]
	content::LaunchTests [0x02A573AD+592]
	LaunchChromeTests [0x04D45151+49]
	main [0x04D44F6A+63]
	__scrt_common_main_seh [0x04D0A465+255] (f:\ddctools\crtcstartup\src\startup\exe_common.inl:255)
	BaseThreadInitThunk [0x76CC337A+18]
	RtlInitializeExceptionChain [0x777792B2+99]
	RtlInitializeExceptionChain [0x77779285+54]

My intuition is that both are caused by the same root cause of the PersonalData not having finished loading.

Assigning to rogerm for recent work in this area (even though the CL may be unrelated): https://chromium.googlesource.com/chromium/src/+/fde6213417d148d604e67d687ac8259cc60ea90d

Here are the flake reports:
https://chromium-try-flakes.appspot.com/all_flake_occurrences?key=ahVzfmNocm9taXVtLXRyeS1mbGFrZXNyMAsSBUZsYWtlIiVBdXRvZmlsbFByaXZhdGVBcGlUZXN0LkdldENvdW50cnlMaXN0DA
https://chromium-try-flakes.appspot.com/all_flake_occurrences?key=ahVzfmNocm9taXVtLXRyeS1mbGFrZXNyLQsSBUZsYWtlIiJBdXRvZmlsbFByaXZhdGVBcGlUZXN0LlJlbW92ZUVudHJ5DA

All flakes happen on windows and I will disable the corresponding tests.