AutoscrollBrowserTest.AutoscrollDirectionChangeAfterFullyScrolled just failed in https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-chromeos-rel/99190 with a TIMEOUT.

[ RUN      ] AutoscrollBrowserTest.AutoscrollDirectionChangeAfterFullyScrolled
[29072:29158:0921/023018.789013:ERROR:network_service.cc(88)] Not implemented reached in std::unique_ptr<net::NetworkChangeNotifier> network::(anonymous namespace)::CreateNetworkChangeNotifierIfNeeded()
[29072:29072:0921/023018.830894:ERROR:proxy_resolution_service.cc(1555)] ProxyConfigService for ChromeOS should be created in profile_io_data.cc::CreateProxyConfigService and this should be used only for examples.
DevTools listening on ws://127.0.0.1:37985/devtools/browser/826e8d0b-bee3-4f90-9c62-7ff27106658c
BrowserTestBase received signal: Terminated. Backtrace:
#0 0x00000376d93c base::debug::StackTrace::StackTrace()
#1 0x0000032ad0f5 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7f9400530cb0 <unknown>
#3 0x7f94005f86d3 epoll_wait
#4 0x0000037ad1ad epoll_dispatch
#5 0x0000037aac8c event_base_loop
#6 0x00000378a54b base::MessagePumpLibevent::Run()
#7 0x0000036e4274 base::MessageLoop::Run()
#8 0x000003705f69 base::RunLoop::Run()
#9 0x0000032b4bae content::InputMsgWatcher::WaitForAck()
#10 0x000000cec1b2 content::AutoscrollBrowserTest_AutoscrollDirectionChangeAfterFullyScrolled_Test::RunTestOnMainThread()
#11 0x0000032ac582 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#12 0x00000332a7a9 content::ShellBrowserMainParts::PreMainMessageLoopRun()
#13 0x000002b3e991 content::BrowserMainLoop::PreMainMessageLoopRun()
#14 0x000002fe5e35 content::StartupTaskRunner::RunAllTasksNow()
#15 0x000002b3d0c7 content::BrowserMainLoop::CreateStartupTasks()
#16 0x000002b41233 content::BrowserMainRunnerImpl::Initialize()
#17 0x00000330d1c0 ShellBrowserMain()
#18 0x000003301050 content::ShellMainDelegate::RunProcess()
#19 0x000002a4083b content::ContentMainRunnerImpl::Run()
#20 0x000004d83095 service_manager::Main()
#21 0x000001db13b4 content::ContentMain()
#22 0x0000032ac149 content::BrowserTestBase::SetUp()
#23 0x000001a1b0fd testing::Test::Run()
#24 0x000001a1bd20 testing::TestInfo::Run()
#25 0x000001a1c237 testing::TestCase::Run()
#26 0x000001a27fa7 testing::internal::UnitTestImpl::RunAllTests()
#27 0x000001a27b1d testing::UnitTest::Run()
#28 0x0000032e2981 base::TestSuite::Run()
#29 0x0000032a558a content::ContentTestLauncherDelegate::RunTestSuite()
#30 0x0000032c8a9c content::LaunchTests()
#31 0x0000032a5550 main
#32 0x7f940051bf45 __libc_start_main
#33 0x000000941f0a _start
[905/1472] AutoscrollBrowserTest.AutoscrollDirectionChangeAfterFullyScrolled (TIMED OUT)

Since it's a new test, I guess it's untested and might have a bug.