This issue applies to Chrome OS + --enable-features=NetworkService only.

How to Reproduce:
1. Compile with Chrome OS on Linux
2. out/osDefault/browser_tests --brave-new-test-launcher --enable-features=NetworkService --gtest_filter=DeviceIDTest.NewUsers

Sample Output:
```
BrowserTestBase received signal: Terminated. Backtrace:
#0 0x000004e30dac base::debug::StackTrace::StackTrace()
#1 0x00000543b9c5 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#2 0x7f643f536030 <unknown>
#3 0x7f643f5ec083 epoll_wait
#4 0x000005affcdd epoll_dispatch
#5 0x000005afd7bc event_base_loop
#6 0x000004e4eddb base::MessagePumpLibevent::Run()
#7 0x000004d9f7e4 base::MessageLoop::Run()
#8 0x000004dc7fa9 base::RunLoop::Run()
#9 0x000005463c5f content::WindowedNotificationObserver::Wait()
#10 0x000001b6236f chromeos::DeviceIDTest::SignInOnline()
#11 0x000001b62041 chromeos::DeviceIDTest_PRE_PRE_PRE_PRE_PRE_NewUsers_Test::RunTestOnMainThread()
#12 0x00000543ae52 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#13 0x000004f0de4c ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#14 0x000004f0cd1a ChromeBrowserMainParts::PreMainMessageLoopRun()
#15 0x000003c4fc58 chromeos::ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun()
#16 0x000002fe89e1 content::BrowserMainLoop::PreMainMessageLoopRun()
#17 0x000003493105 content::StartupTaskRunner::RunAllTasksNow()
#18 0x000002fe7127 content::BrowserMainLoop::CreateStartupTasks()
#19 0x000002feb263 content::BrowserMainRunnerImpl::Initialize()
#20 0x000002fe4c92 content::BrowserMain()
#21 0x000004ce769f content::ContentMainRunnerImpl::Run()
#22 0x000006f3fec5 service_manager::Main()
#23 0x000004ce5b34 content::ContentMain()
#24 0x00000543aa19 content::BrowserTestBase::SetUp()
#25 0x000004eaf2a5 InProcessBrowserTest::SetUp()
#26 0x000001b71561 chromeos::OobeBaseTest::SetUp()
#27 0x000002220e9d testing::Test::Run()
#28 0x000002221ac0 testing::TestInfo::Run()
#29 0x000002221fd7 testing::TestCase::Run()
#30 0x00000222ddf7 testing::internal::UnitTestImpl::RunAllTests()
#31 0x00000222d96d testing::UnitTest::Run()
#32 0x000004ec6711 base::TestSuite::Run()
#33 0x000004d799fd ChromeTestSuiteRunner::RunTestSuite()
#34 0x00000545f48c content::LaunchTests()
#35 0x000004d79ec3 LaunchChromeTests()
#36 0x000004d7998e main
#37 0x7f643f5232b1 __libc_start_main
#38 0x000000ab9f8a _start
```