linux-chromeos-dbg: https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/linux-chromeos-dbg/10305

single_process_mash_browser_tests: CrExtensionsManagerUnitTest.UninstallFromDetails

[8128:8128:0116/142854.371038:ERROR:CONSOLE(55)] "Uncaught TypeError: Cannot read property 'getDetailsButton' of null", source: chrome://extensions/item_list.js (55)
[8128:8128:0116/142854.382987:ERROR:web_ui_browser_test.cc(488)] CONDITION FAILURE: encountered javascript console error(s):
[8128:8128:0116/142854.383060:ERROR:web_ui_browser_test.cc(490)] JS ERROR: '[8128:8128:0116/142854.371038:ERROR:CONSOLE(55)] "Uncaught TypeError: Cannot read property 'getDetailsButton' of null", source: chrome://extensions/item_list.js (55)
'
[8128:8128:0116/142854.383107:ERROR:web_ui_browser_test.cc(492)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/extensions/cr_extensions_browsertest-gen.cc:1650: Failure
Value of: RunJavascriptTestF( true, "CrExtensionsManagerUnitTest", "UninstallFromDetails")
  Actual: false
Expected: true
Stack trace:
#0 0x55617528e9a0 StackTraceGetter::CurrentStackTrace()
#1 0x55617529a797 testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop()
#2 0x55617529a323 testing::internal::AssertHelper::operator=()
#3 0x556174693457 CrExtensionsManagerUnitTest_UninstallFromDetails_Test::RunTestOnMainThread()
#4 0x556178768c64 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#5 0x556172bc02bd base::internal::FunctorTraits<>::Invoke<>()
#6 0x556172bc0201 base::internal::InvokeHelper<>::MakeItSo<>()
#7 0x55617876adb7 _ZN4base8internal7InvokerINS0_9BindStateIMN7content15BrowserTestBaseEFvvEJNS0_17UnretainedWrapperIS4_EEEEEFvvEE7RunImplIRKS6_RKNSt4__Cr5tupleIJS8_EEEJLm0EEEEvOT_OT0_NSF_16integer_sequenceImJXspT1_EEEE
#8 0x55617876acec base::internal::Invoker<>::Run()
#9 0x556172bb2e4d _ZNKR4base17RepeatingCallbackIFvvEE3RunEv
#10 0x556177b412cf ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#11 0x556177b4007e ChromeBrowserMainParts::PreMainMessageLoopRun()
#12 0x5561749500a4 chromeos::ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun()
#13 0x7f1511406c57 content::BrowserMainLoop::PreMainMessageLoopRun()
#14 0x7f15105a935d base::internal::FunctorTraits<>::Invoke<>()
#15 0x7f15105a92a1 base::internal::InvokeHelper<>::MakeItSo<>()
#16 0x7f151140d117 _ZN4base8internal7InvokerINS0_9BindStateIMN7content15BrowserMainLoopEFivEJNS0_17UnretainedWrapperIS4_EEEEEFivEE7RunImplIRKS6_RKNSt4__Cr5tupleIJS8_EEEJLm0EEEEiOT_OT0_NSF_16integer_sequenceImJXspT1_EEEE
#17 0x7f151140d04c base::internal::Invoker<>::Run()
#18 0x7f151050275d _ZNKR4base17RepeatingCallbackIFvvEE3RunEv
#19 0x7f1511f7facc content::StartupTaskRunner::RunAllTasksNow()
#20 0x7f1511405485 content::BrowserMainLoop::CreateStartupTasks()
#21 0x7f151140f50e content::BrowserMainRunnerImpl::Initialize()
#22 0x7f15114026c9 content::BrowserMain()
#23 0x7f1512e49bdb content::RunBrowserProcessMain()
#24 0x7f1512e4ae96 content::ContentMainRunnerImpl::RunServiceManager()
#25 0x7f1512e4a950 content::ContentMainRunnerImpl::Run()
#26 0x7f1512e47f19 content::ContentServiceManagerMainDelegate::RunEmbedderProcess()
#27 0x7f14ecfcfd23 service_manager::Main()
#28 0x7f1512e496e5 content::ContentMain()
#29 0x556178768779 content::BrowserTestBase::SetUp()
#30 0x556177a7a6de InProcessBrowserTest::SetUp()
#31 0x556172bfa3be testing::internal::InvokeHelper<>::InvokeMethod<>()