Flaky dashboard:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=content_unittests&tests=EmbeddedWorkerInstanceTest.AddMessageToConsole


This is the crash dump of EWInstanceTest.AddMessageToConsole:

[18265:18265:0418/102940.610783:2420576254721:FATAL:worker_devtools_agent_host.cc(116)] Check failed: WORKER_TERMINATED == state_ (2 vs. 0)
#0 0x7ff27a42a3fb base::debug::StackTrace::StackTrace()
#1 0x7ff27a4290fc base::debug::StackTrace::StackTrace()
#2 0x7ff27a49bf2f logging::LogMessage::~LogMessage()
#3 0x7ff276a33756 content::WorkerDevToolsAgentHost::WorkerRestarted()
#4 0x7ff276a2473f content::ServiceWorkerDevToolsManager::WorkerCreated()
#5 0x7ff27723f163 content::(anonymous namespace)::SetupOnUI()
#6 0x7ff277244e96 _ZN4base8internal13FunctorTraitsIPFviPKN7content24ServiceWorkerContextCoreERKNS_7WeakPtrIS3_EElRK4GURLSC_bN4mojo16InterfaceRequestINS2_5mojom28EmbeddedWorkerInstanceClientEEERKNS_8CallbackIFvibELNS0_8CopyModeE1ELNS0_10RepeatModeE1EEEEvE6InvokeIJRKiRKPS3_S9_RKlSC_SC_RKbSH_SO_EEEvSQ_DpOT_
#7 0x7ff277244bac _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKPFviPKN7content24ServiceWorkerContextCoreERKNS_7WeakPtrIS5_EElRK4GURLSE_bN4mojo16InterfaceRequestINS4_5mojom28EmbeddedWorkerInstanceClientEEERKNS_8CallbackIFvibELNS0_8CopyModeE1ELNS0_10RepeatModeE1EEEEJRKiRKPS5_SB_RKlSE_SE_RKbSJ_SQ_EEEvOT_DpOT0_
#8 0x7ff277244a78 _ZN4base8internal7InvokerINS0_9BindStateIPFviPKN7content24ServiceWorkerContextCoreERKNS_7WeakPtrIS4_EElRK4GURLSD_bN4mojo16InterfaceRequestINS3_5mojom28EmbeddedWorkerInstanceClientEEERKNS_8CallbackIFvibELNS0_8CopyModeE1ELNS0_10RepeatModeE1EEEEJiPS4_S8_lSB_SB_bNS0_13PassedWrapperISI_EESN_EEEFvvEE7RunImplIRKSR_RKSt5tupleIJiSS_S8_lSB_SB_bSU_SN_EEJLm0ELm1ELm2ELm3ELm4ELm5ELm6ELm7ELm8EEEEvOT_OT0_NS_13IndexSequenceIJXspT1_EEEE
#9 0x7ff27724476c _ZN4base8internal7InvokerINS0_9BindStateIPFviPKN7content24ServiceWorkerContextCoreERKNS_7WeakPtrIS4_EElRK4GURLSD_bN4mojo16InterfaceRequestINS3_5mojom28EmbeddedWorkerInstanceClientEEERKNS_8CallbackIFvibELNS0_8CopyModeE1ELNS0_10RepeatModeE1EEEEJiPS4_S8_lSB_SB_bNS0_13PassedWrapperISI_EESN_EEEFvvEE3RunEPNS0_13BindStateBaseE
#10 0x7ff27a43090e _ZNO4base8CallbackIFvvELNS_8internal8CopyModeE0ELNS2_10RepeatModeE0EE3RunEv
#11 0x7ff27a43004e base::debug::TaskAnnotator::RunTask()
#12 0x7ff27a4c077d base::MessageLoop::RunTask()
#13 0x7ff27a4c0a04 base::MessageLoop::DeferOrRunPendingTask()
#14 0x7ff27a4c0cf4 base::MessageLoop::DoWork()
#15 0x7ff27a4dac2e base::MessagePumpLibevent::Run()
#16 0x7ff27a4c0317 base::MessageLoop::RunHandler()
#17 0x7ff27a56328a base::RunLoop::Run()
#18 0x7ff27a563509 base::RunLoop::RunUntilIdle()
#19 0x000001244d72 content::EmbeddedWorkerInstanceTest_AddMessageToConsole_Test::TestBody()
#20 0x000000e5fdde _ZN7testing8internal12InvokeHelperIdSt5tupleIJEEE12InvokeMethodIN5media23VirtualAudioInputStreamEMS7_FdvEEEdPT_T0_RKS3_
#21 0x0000023694f2 testing::internal::HandleExceptionsInMethodIfSupported<>()
#22 0x00000235e256 testing::Test::Run()
#23 0x00000235ea0d testing::TestInfo::Run()
#24 0x00000235efaf testing::TestCase::Run()
#25 0x00000236431c testing::internal::UnitTestImpl::RunAllTests()
#26 0x000000e5f23e _ZN7testing8internal12InvokeHelperIbSt5tupleIJEEE12InvokeMethodIN5media23VirtualAudioInputStreamEMS7_FbvEEEbPT_T0_RKS3_
#27 0x00000236abe2 testing::internal::HandleExceptionsInMethodIfSupported<>()
#28 0x000002363fbf testing::UnitTest::Run()
#29 0x0000021c0411 RUN_ALL_TESTS()
#30 0x0000021bf2d2 base::TestSuite::Run()
#31 0x00000215262d content::UnitTestTestSuite::Run()
#32 0x000000732025 _ZN4base8internal13FunctorTraitsIMN7content26AppCacheRequestHandlerTestEFvvEvE6InvokeIPS3_JEEEvS5_OT_DpOT0_
#33 0x000000731f41 _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKMN7content26AppCacheRequestHandlerTestEFvvEJPS5_EEEvOT_DpOT0_
#34 0x00000170eba7 _ZN4base8internal7InvokerINS0_9BindStateIMN7content17UnitTestTestSuiteEFivEJNS0_17UnretainedWrapperIS4_EEEEEFivEE7RunImplIRKS6_RKSt5tupleIJS8_EEJLm0EEEEiOT_OT0_NS_13IndexSequenceIJXspT1_EEEE
#35 0x00000170eaec _ZN4base8internal7InvokerINS0_9BindStateIMN7content17UnitTestTestSuiteEFivEJNS0_17UnretainedWrapperIS4_EEEEEFivEE3RunEPNS0_13BindStateBaseE
#36 0x00000073e46d _ZNKR4base8CallbackIFvvELNS_8internal8CopyModeE1ELNS2_10RepeatModeE1EE3RunEv
#37 0x0000021e1726 base::(anonymous namespace)::LaunchUnitTestsInternal()
#38 0x0000021e1594 base::LaunchUnitTests()
#39 0x00000170e97f main
#40 0x7ff268e25f45 __libc_start_main
#41 0x0000006b1874 <unknown>