Example build: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win7_chromium_rel_ng/141443
Example swarming task:
https://chromium-swarm.appspot.com/task?id=417a6385216b5610&refresh=10&show_raw=1
"""
[ RUN ] UserScriptListenerTest.NavigationWaitsForContentScriptsToLoad
[9876:11216:1129/144306.843:WARNING:chrome_browser_main_win.cc(647)] Command line too long for RegisterApplicationRestart: --cfi-diag=0 --disable-gpu-process-for-dx12-vulkan-info-collection --gtest_also_run_disabled_tests --gtest_filter=UserScriptListenerTest.NavigationWaitsForContentScriptsToLoad --single_process --test-launcher-bot-mode --test-launcher-output="e:\b\s\w\itzsoxzx\scoped_dir3408_24189\results3408_27597\test_results.xml" --test-launcher-summary-output="e:\b\s\w\io4tugal\output.json" --user-data-dir="e:\b\s\w\itzsoxzx\scoped_dir3408_24189\d3408_2961" --disable-offline-auto-reload --no-first-run --no-default-browser-check --enable-logging=stderr --disable-default-apps --wm-window-animations-disabled --disable-component-update --test-type=browser --force-color-profile=srgb --disable-zero-browsers-open-for-tests --browser-test --ipc-connection-timeout=30 --allow-file-access-from-files --dom-automation --log-gpu-control-list-decisions --disable-backgrounding-occluded-windows --disable-gl-drawing-for-tests --override-use-software-gl-for-tests --force-color-profile=srgb --disable-compositor-ukm-for-tests --enable-features=TestFeatureForBrowserTest1 --disable-features=TestFeatureForBrowserTest2 --disable-gpu-process-for-dx12-vulkan-info-collection --flag-switches-begin --flag-switches-end --file-url-path-alias="/gen=e:\b\s\w\ir\out\Release\gen" --restore-last-session about:blank
[7836:7384:1129/144306.905:INFO:media_foundation_video_encode_accelerator_win.cc(347)] Windows versions earlier than 8 are not supported.
[9876:9668:1129/144306.905:WARNING:discovery_network_list_win.cc(195)] Failed to open Wlan client handle: 1062
[9876:11216:1129/144306.936:WARNING:gaia_auth_fetcher.cc(891)] Could not reach Google Accounts servers: errno -11
[9876:636:1129/144307.171:WARNING:embedded_test_server.cc(239)] Request not handled. Returning 404: /favicon.ico
[9876:11216:1129/144307.169:FATAL:thread_restrictions.cc(34)] Check failed: !g_blocking_disallowed.Get().Get(). Function marked as blocking was called from a scope that disallows blocking! If this task is running inside the TaskScheduler, it needs to have MayBlock() in its TaskTraits. Otherwise, consider making this blocking work asynchronous or, as a last resort, you may use ScopedAllowBlocking (see its documentation for best practices).
Backtrace:
base::debug::StackTrace::StackTrace [0x03C032B0+32]
base::debug::StackTrace::StackTrace [0x03C02A2D+13]
logging::LogMessage::~LogMessage [0x03C1A240+96]
base::AssertBlockingAllowedDeprecated [0x03C76A89+105]
base::ScopedBlockingCall::ScopedBlockingCall [0x03C73AC1+129]
base::DeleteFileW [0x03C1184C+60]
base::ScopedTempDir::~ScopedTempDir [0x03C16A8C+44]
TestingProfile::~TestingProfile [0x03BF7579+493]
extensions::UserScriptListenerTest_NavigationWaitsForContentScriptsToLoad_Test::RunTestOnMainThread [0x01312A2A+750]
content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x03E902E4+436]
ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x04D1D856+4236]
ChromeBrowserMainParts::PreMainMessageLoopRun [0x04D1C70E+158]
content::BrowserMainLoop::PreMainMessageLoopRun [0x0228AD53+51]
content::StartupTaskRunner::RunAllTasksNow [0x0260EA38+30]
content::BrowserMainLoop::CreateStartupTasks [0x02289CA4+804]
content::BrowserMainRunnerImpl::Initialize [0x0228CFA8+88]
content::BrowserMain [0x0228802A+126]
content::RunBrowserProcessMain [0x03A5249C+84]
content::ContentMainRunnerImpl::RunServiceManager [0x03A52E45+625]
content::ContentMainRunnerImpl::Run [0x03A52BAF+351]
content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x03A52123+19]
service_manager::Main [0x0465E710+1384]
content::ContentMain [0x03A523EF+51]
content::BrowserTestBase::SetUp [0x03E9003B+1947]
InProcessBrowserTest::SetUp [0x03CCF19D+413]
testing::Test::Run [0x0167E77C+112]
testing::TestInfo::Run [0x0167EFDF+215]
testing::TestCase::Run [0x0167F47C+244]
testing::internal::UnitTestImpl::RunAllTests [0x01685C35+629]
testing::UnitTest::Run [0x016858BB+153]
base::TestSuite::Run [0x03CE170E+100]
ChromeTestSuiteRunner::RunTestSuite [0x07BB6113+51]
content::LaunchTests [0x03EA7F94+394]
LaunchChromeTests [0x07BB64AB+259]
main [0x07BB609F+111]
__scrt_common_main_seh [0x07BD3DFC+250] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:283)
BaseThreadInitThunk [0x76C6343D+18]
RtlInitializeExceptionChain [0x771F9802+99]
RtlInitializeExceptionChain [0x771F97D5+54]
"""
