Output:

[ RUN      ] CrElementsInputTest.All
[18274:18274:1009/055933.851453:WARNING:chrome_browser_main_chromeos.cc(563)] Running as stub user with profile dir: test-user
[18274:18274:1009/055933.947694:INFO:remote_commands_service.cc(38)] Fetching remote commands.
[18274:18274:1009/055933.957510:WARNING:remote_commands_service.cc(40)] Client is not registered.
[18274:18274:1009/055933.957554:INFO:remote_commands_invalidator.cc(32)] Initialize RemoteCommandsInvalidator.
[18274:18274:1009/055933.957585:INFO:remote_commands_invalidator.cc(57)] Starting RemoteCommandsInvalidator.
[18274:18274:1009/055933.957610:INFO:remote_commands_invalidator.cc(123)] RemoteCommandsInvalidator ReloadPolicyData.
[18274:18274:1009/055933.957631:INFO:remote_commands_invalidator.cc(167)] Unregister RemoteCommandsInvalidator.
[18274:18274:1009/055934.077177:ERROR:gpu_interface_provider.cc(87)] Not implemented reached in virtual void content::GpuInterfaceProvider::RegisterOzoneGpuInterfaces(service_manager::BinderRegistry *)
[18274:18274:1009/055934.216736: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)
[18274:18274:1009/055934.256221: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)
[18274:18274:1009/055934.288418:INFO:CONSOLE(1269)] "Running TestCase CrElementsInputTest.All", source: file:///b/s/w/ir/chrome/test/data/webui/test_api.js (1269)
[18274:18274:1009/055934.301509: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)
[18274:18274:1009/055934.313172:ERROR:CONSOLE(48)] "Mocha test failed: cr-input startingWithDisableSetsTabIndexCorrectly
AssertionError: expected '14' to equal null
    at Function.assert.strictEqual (file:///b/s/w/ir/third_party/chaijs/chai.js:2277:32)
    at assertEquals (file:///b/s/w/ir/chrome/test/data/webui/test_api.js:911:15)
    at Context.<anonymous> (file:///b/s/w/ir/chrome/test/data/webui/cr_elements/cr_input_test.js:76:5)
", source: file:///b/s/w/ir/chrome/test/data/webui/mocha_adapter.js (48)
[18274:18274:1009/055934.822337:ERROR:web_ui_test_handler.cc(100)] Test Errors: 1/15 tests had failed assertions.
[18274:18274:1009/055934.822379:ERROR:web_ui_browser_test.cc(493)] CONDITION FAILURE: encountered javascript console error(s):
[18274:18274:1009/055934.822386:ERROR:web_ui_browser_test.cc(495)] JS ERROR: '[18274:18274:1009/055934.313172:ERROR:CONSOLE(48)] "Mocha test failed: cr-input startingWithDisableSetsTabIndexCorrectly
AssertionError: expected '14' to equal null
    at Function.assert.strictEqual (file:///b/s/w/ir/third_party/chaijs/chai.js:2277:32)
    at assertEquals (file:///b/s/w/ir/chrome/test/data/webui/test_api.js:911:15)
    at Context.<anonymous> (file:///b/s/w/ir/chrome/test/data/webui/cr_elements/cr_input_test.js:76:5)
", source: file:///b/s/w/ir/chrome/test/data/webui/mocha_adapter.js (48)
'
[18274:18274:1009/055934.822396:ERROR:web_ui_browser_test.cc(497)] JS call assumed failed, because JS console error(s) found.
gen/chrome/test/data/webui/cr_elements/cr_elements_focus_test-gen.cc:187: Failure
Value of: RunJavascriptTestF( true, "CrElementsInputTest", "All")
  Actual: false
Expected: true
Stack trace:
#0 0x000000871aec testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop()
#1 0x0000008714b9 testing::internal::AssertHelper::operator=()
#2 0x00000077a9f3 CrElementsInputTest_All_Test::RunTestOnMainThread()
#3 0x000002d4b70b content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#4 0x00000299c8d4 ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#5 0x00000299b81c ChromeBrowserMainParts::PreMainMessageLoopRun()
#6 0x000001d2cab1 chromeos::ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun()
#7 0x0000013cac2a content::BrowserMainLoop::PreMainMessageLoopRun()
#8 0x000001757557 content::StartupTaskRunner::RunAllTasksNow()
#9 0x0000013c9856 content::BrowserMainLoop::CreateStartupTasks()
#10 0x0000013ccfa0 content::BrowserMainRunnerImpl::Initialize()
#11 0x0000013c7894 content::BrowserMain()
#12 0x000002946694 content::ContentMainRunnerImpl::Run()
#13 0x00000462e7a0 service_manager::Main()
#14 0x000002944b54 content::ContentMain()
#15 0x000002d4b333 content::BrowserTestBase::SetUp()
#16 0x00000298cbb4 InProcessBrowserTest::SetUp()

[18274:18274:1009/055934.960310:ERROR:http_bridge.cc(126)] Not implemented reached in virtual void syncer::HttpBridgeFactory::OnSignalReceived()
[18274:18274:1009/055934.960796:INFO:remote_commands_invalidator.cc(45)] Shutdown RemoteCommandsInvalidator.
[18274:18274:1009/055934.960864:INFO:remote_commands_invalidator.cc(68)] Stopping RemoteCommandsInvalidator.
[18274:18274:1009/055934.960883:INFO:remote_commands_invalidator.cc(167)] Unregister RemoteCommandsInvalidator.
[18274:18274:1009/055934.976512:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[18274:18274:1009/055934.989808:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[  FAILED  ] CrElementsInputTest.All, where TypeParam =  and GetParam() =  (1263 ms)

Possible dupe of https://bugs.chromium.org/p/chromium/issues/detail?id=895832