Chrome Version: 69.0.3491.0 (Developer Build) (64-bit)
OS: Linux

What steps will reproduce the problem?
(1) sign into chrome
(2) sign out
(3) try to sign in with a different account
(4) "<Someone else> was previously using Chrome" dialog pops up
(5) click "Continue"

What is the expected result?
Chrome creates a new profile with the new account syncing.

What happens instead?
Chrome crashes.

Here is the stack trace:

[89187:89187:0713/163804.558256:FATAL:signin_email_confirmation_dialog.cc(190)] Check failed: false. Unexpected action value [unknown]
#0 0x55bbc70567cc base::debug::StackTrace::StackTrace()
#1 0x55bbc6fa450b logging::LogMessage::~LogMessage()
#2 0x55bbc996665b SigninEmailConfirmationDialog::OnDialogClosed()
#3 0x55bbc97f3b9f ConstrainedWebDialogUI::OnDialogCloseMessage()
#4 0x55bbc5668e05 content::WebUIImpl::ProcessWebUIMessage()
#5 0x55bbc5668014 content::WebUIImpl::OnWebUISend()
#6 0x55bbc5667dbc _ZN3IPC8MessageTI27FrameHostMsg_WebUISend_MetaNSt3__15tupleIJNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEEN4base9ListValueEEEEvE8DispatchIN7content9WebUIImplESG_NSF_15RenderFrameHostEMSG_FvPSH_RKS9_RKSB_EEEbPKNS_7MessageEPT_PT0_PT1_T2_
#7 0x55bbc5667ce9 content::WebUIImpl::OnMessageReceived()
#8 0x55bbc561f731 content::WebContentsImpl::OnMessageReceived()
#9 0x55bbc52ab475 content::RenderFrameHostImpl::OnMessageReceived()
#10 0x55bbc54cc58b content::RenderProcessHostImpl::OnMessageReceived()
#11 0x55bbc768f291 IPC::ChannelProxy::Context::OnDispatchMessage()
#12 0x55bbc4988cb8 _ZN4base8internal7InvokerINS0_9BindStateIMN5media20AudioInputControllerEFvRKNSt3__112basic_stringIcNS5_11char_traitsIcEENS5_9allocatorIcEEEEEJ13scoped_refptrIS4_ESB_EEEFvvEE7RunOnceEPNS0_13BindStateBaseE
#13 0x55bbc6fad4ad base::debug::TaskAnnotator::RunTask()
#14 0x55bbc6fabb26 base::MessageLoop::RunTask()
#15 0x55bbc6fabf3a base::MessageLoop::DeferOrRunPendingTask()
#16 0x55bbc6fac26c base::MessageLoop::DoWork()
#17 0x55bbc6fb19bf base::(anonymous namespace)::WorkSourceDispatch()
#18 0x7f116b9caf07 g_main_context_dispatch
#19 0x7f116b9cb138 <unknown>
#20 0x7f116b9cb1cc g_main_context_iteration
#21 0x55bbc6fb1772 base::MessagePumpGlib::Run()
#22 0x55bbc6fab491 base::MessageLoop::Run()
#23 0x55bbc6fd7ab6 base::RunLoop::Run()
#24 0x55bbc6bf8718 ChromeBrowserMainParts::MainMessageLoopRun()
#25 0x55bbc511a447 content::BrowserMainLoop::RunMainMessageLoopParts()
#26 0x55bbc511d5c3 content::BrowserMainRunnerImpl::Run()
#27 0x55bbc51161d9 content::BrowserMain()
#28 0x55bbc6b9bc34 content::ContentMainRunnerImpl::Run()
#29 0x55bbc6bd2309 service_manager::Main()
#30 0x55bbc6b99c91 content::ContentMain()
#31 0x55bbc42e41b3 ChromeMain
#32 0x7f116794e2b1 __libc_start_main
#33 0x55bbc42e402a _start

David said you were working on this Mihai, so assigning to you.