(chromium build sheriff)
The CL looks changing the test.
Assigned this to the author of the CL.

In the error logs, I see:

[18255:18255:1214/015534.973241:FATAL:guest_view_manager.cc(80)] Check failed: view_destruction_callback_map_.empty().

I'm going to disable this test in a bit if I don't hear back from anyone.

I'll take a look today.

Thanks. I'm not sure why FindIt decided this is worthy of a bug report, as it only occurred once. Lowering to P2 and taking this out of the sheriff queue.

I've had a hard time reproducing this over a few hundred runs. The test seems to have always been broken/flaky though if you run it on a loaded system, so assigning to the original author.

# terminal 1
$ stress -i 30 -c 50 -m 50 -t 120
# terminal 2
$ ./out/Release/browser_tests --gtest_filter=HandsOffEnrollmentTest.NetworkConnectionReady
IMPORTANT DEBUGGING NOTE: each test is run inside its own process.
For debugging a test inside a debugger, use the
--gtest_filter=<your_test_name> flag along with either
--single_process (to run the test in one launcher/browser process) or
--single-process (to do the above, and also run Chrome in single-process mode).
Using sharding settings from environment. This is shard 0/1
Using 1 parallel jobs.
Note: Google Test filter = HandsOffEnrollmentTest.NetworkConnectionReady
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from HandsOffEnrollmentTest, where TypeParam = 
[ RUN      ] HandsOffEnrollmentTest.NetworkConnectionReady
[172597:172597:1218/110243.318419:WARNING:chrome_browser_main_chromeos.cc(544)] Running as stub user with profile dir: test-user
[172597:172597:1218/110243.673293:WARNING:easy_unlock_service_regular.cc(523)] EasyUnlockServiceRegular::IsInLegacyHostMode: DeviceSyncClient not ready. Returning false.
[172597:172597:1218/110243.761928:INFO:remote_commands_service.cc(38)] Fetching remote commands.
[172597:172597:1218/110243.764986:WARNING:remote_commands_service.cc(40)] Client is not registered.
[172597:172597:1218/110243.765069:INFO:remote_commands_invalidator.cc(32)] Initialize RemoteCommandsInvalidator.
[172597:172597:1218/110243.765101:INFO:remote_commands_invalidator.cc(57)] Starting RemoteCommandsInvalidator.
[172597:172597:1218/110243.765126:INFO:remote_commands_invalidator.cc(123)] RemoteCommandsInvalidator ReloadPolicyData.
[172597:172597:1218/110243.765148:INFO:remote_commands_invalidator.cc(167)] Unregister RemoteCommandsInvalidator.
[172597:172597:1218/110243.861813:WARNING:wallpaper_controller_client.cc(358)] Cannot get wallpaper files id in RemovePolicyWallpaper. This should never happen under normal circumstances.
[172597:172796:1218/110244.194358:WARNING:simple_synchronous_entry.cc(1251)] Could not open platform files for entry.
[172597:172597:1218/110244.338761:ERROR:gpu_interface_provider.cc(87)] Not implemented reached in virtual void content::GpuInterfaceProvider::RegisterOzoneGpuInterfaces(service_manager::BinderRegistry *)
[172597:172597:1218/110249.906519:WARNING:CONSOLE(0)] "HTML Imports is deprecated and will be removed in M73, around March 2019. Please use ES modules instead. See https://www.chromestatus.com/features/5144752345317376 for more details.", source:  (0)
[172597:172597:1218/110250.568952:WARNING:CONSOLE(442)] "document.registerElement is deprecated and will be removed in M73, around March 2019. Please use window.customElements.define instead. See https://www.chromestatus.com/features/4642138092470272 for more details.", source: chrome://resources/polymer/v1_0/polymer/polymer-micro-extracted.js (442)
[172597:172597:1218/110254.787585:WARNING:CONSOLE(2083)] "Element.createShadowRoot is deprecated and will be removed in M73, around March 2019. Please use Element.attachShadow instead. See https://www.chromestatus.com/features/4507242028072960 for more details.", source: chrome://resources/polymer/v1_0/polymer/polymer-mini-extracted.js (2083)
[172597:172597:1218/110255.222189:WARNING:CONSOLE(2651)] "Could not find style data in module named", source: chrome://resources/polymer/v1_0/polymer/polymer-extracted.js (2651)
Still waiting for the following processes to finish:
	/work2/chrome/src/out/Release/browser_tests --disable-gpu-process-for-dx12-vulkan-info-collection --gtest_also_run_disabled_tests --gtest_filter=HandsOffEnrollmentTest.NetworkConnectionReady --single_process --test-launcher-output=/tmp/.org.chromium.Chromium.9Gnon9/results5Rit1G/test_results.xml --user-data-dir=/tmp/.org.chromium.Chromium.9Gnon9/dko7qcV
[172597:172597:1218/110302.423802:WARNING:CONSOLE(2651)] "Could not find style data in module named", source: chrome://resources/polymer/v1_0/polymer/polymer-extracted.js (2651)
[172597:172597:1218/110302.533651:WARNING:CONSOLE(2651)] "Could not find style data in module named", source: chrome://resources/polymer/v1_0/polymer/polymer-extracted.js (2651)
[172597:172597:1218/110303.584064:WARNING:CONSOLE(2651)] "Could not find style data in module named", source: chrome://resources/polymer/v1_0/polymer/polymer-extracted.js (2651)
[172597:172597:1218/110307.299121:INFO:CONSOLE(9957)] "Loading asset bundle oauth-enrollment", source: chrome://oobe/oobe.js (9957)
[172597:172597:1218/110309.546847:INFO:lock_screen_utils.cc(56)] GetUserLastInputMethod: no input method for this user
BrowserTestBase received signal: Terminated. Backtrace:
#0 0x7fc51f006def base::debug::StackTrace::StackTrace()
#1 0x559f924b85c5 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7fc50f3b1030 <unknown>
#3 0x7fc50f467083 epoll_wait
#4 0x7fc51f04397d epoll_dispatch
#5 0x7fc51f04146c Still waiting for the following processes to finish:
	/work2/chrome/src/out/Release/browser_tests --disable-gpu-process-for-dx12-vulkan-info-collection --gtest_also_run_disabled_tests --gtest_filter=HandsOffEnrollmentTest.NetworkConnectionReady --single_process --test-launcher-output=/tmp/.org.chromium.Chromium.9Gnon9/results5Rit1G/test_results.xml --user-data-dir=/tmp/.org.chromium.Chromium.9Gnon9/dko7qcV
event_base_loop
#6 0x7fc51f02a5ed base::MessagePumpLibevent::Run()
#7 0x7fc51ef44b08 base::MessageLoopImpl::Run()
#8 0x7fc51ef763c9 base::RunLoop::Run()
#9 0x559f924e2753 content::MessageLoopRunner::Run()
#10 0x559f93c13284 chromeos::OobeScreenWaiter::WaitNoAssertCurrentScreen()
#11 0x559f93c12f88 chromeos::OobeScreenWaiter::Wait()
#12 0x559f9080ddf7 chromeos::HandsOffEnrollmentTest_NetworkConnectionReady_Test::RunTestOnMainThread()
#13 0x559f924b7a69 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#14 0x559f91f460e8 ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#15 0x559f91f44edb ChromeBrowserMainParts::PreMainMessageLoopRun()
#16 0x559f90def440 chromeos::ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun()
#17 0x7fc51a066905 content::BrowserMainLoop::PreMainMessageLoopRun()
#18 0x7fc51a552545 content::StartupTaskRunner::RunAllTasksNow()
#19 0x7fc51a06560c content::BrowserMainLoop::CreateStartupTasks()
#20 0x7fc51a068c59 content::BrowserMainRunnerImpl::Initialize()
#21 0x7fc51a06352b content::BrowserMain()
#22 0x7fc51ab2dbb3 content::ContentMainRunnerImpl::RunServiceManager()
#23 0x7fc51ab2da84 content::ContentMainRunnerImpl::Run()
#24 0x7fc50edac216 service_manager::Main()
#25 0x7fc51ab2bfd4 content::ContentMain()
#26 0x559f924b765c content::BrowserTestBase::SetUp()
#27 0x559f91eef531 InProcessBrowserTest::SetUp()
#28 0x559f91226100 testing::Test::Run()
#29 0x559f91226e9f testing::TestInfo::Run()
#30 0x559f912273c7 testing::TestCase::Run()
#31 0x559f91233737 testing::internal::UnitTestImpl::RunAllTests()
#32 0x559f912332ad testing::UnitTest::Run()
#33 0x559f91f00fd1 base::TestSuite::Run()
#34 0x559f91ea8d0d ChromeTestSuiteRunner::RunTestSuite()
#35 0x559f924de35a content::LaunchTests()
#36 0x559f91ea91d3 LaunchChromeTests()
#37 0x559f91ea8c9e main
#38 0x7fc50f39e2b1 __libc_start_main
#39 0x559f8f82ddfa _start
[1218/110312.762058:ERROR:kill_posix.cc(84)] Unable to terminate process group 172597: No such process (3)
[1/1] HandsOffEnrollmentTest.NetworkConnectionReady (TIMED OUT)
1 test timed out:
    HandsOffEnrollmentTest.NetworkConnectionReady (../../chrome/browser/chromeos/login/enrollment/hands_off_enrollment_browsertest.cc:129)