Chrome Version: Chromium 68.0.3431.0 
OS: Chrome OS

What steps will reproduce the problem?
(1) Install API keys and open Chrome OS build with --login-manager
(2) Sign in to an account with a dot in it e.g. faketastic.jane@gmail.com.

What is the expected result?

Sign in works.

What happens instead?

After several seconds:
[108188:108188:0515/180258.515869:FATAL:identity_manager.cc(58)] Check failed: signin_manager_->GetAuthenticatedAccountInfo().email == primary_account_info_.email (faketastic.jane@gmail.com vs. faketasticjane@gmail.com)
#0 0x7ff6d93a91dc base::debug::StackTrace::StackTrace()
#1 0x7ff6d92f0b3b logging::LogMessage::~LogMessage()
#2 0x55b6a3a813ff identity::IdentityManager::GetPrimaryAccountInfo()
#3 0x55b6a518dfff browser_sync::ProfileSyncService::GetAuthenticatedAccountInfo()
#4 0x55b6a5182186 browser_sync::ProfileSyncService::CanSyncStart()
#5 0x55b6a603c2bb syncer::GetUploadToGoogleState()
#6 0x55b6a4baf1bb suggestions::SuggestionsServiceImpl::OnStateChanged()
#7 0x55b6a5183f44 browser_sync::ProfileSyncService::NotifyObservers()
#8 0x55b6a5188714 browser_sync::ProfileSyncService::OnConnectionStatusChange()
#9 0x55b6a6031822 syncer::SyncBackendHostImpl::HandleConnectionStatusChangeOnFrontendLoop()
#10 0x55b6a3a1e5eb _ZN4base8internal7InvokerINS0_9BindStateIMN11google_apis19UrlFetchRequestBaseEFvNS3_17DriveApiError
CodeEEJNS_7WeakPtrIS4_EES5_EEEFvvEE3RunEPNS0_13BindStateBaseE
#11 0x7ff6d92d3795 base::debug::TaskAnnotator::RunTask()
#12 0x7ff6d92fd399 base::internal::IncomingTaskQueue::RunTask()
#13 0x7ff6d930088b base::MessageLoop::RunTask()
#14 0x7ff6d9300c1a base::MessageLoop::DeferOrRunPendingTask()
#15 0x7ff6d9300e7c base::MessageLoop::DoWork()
#16 0x7ff6d93c9469 base::MessagePumpLibevent::Run()
#17 0x7ff6d9300274 base::MessageLoop::Run()
#18 0x7ff6d9332d69 base::RunLoop::Run()
#19 0x55b6a453d287 ChromeBrowserMainParts::MainMessageLoopRun()
#20 0x7ff6d64264f7 content::BrowserMainLoop::RunMainMessageLoopParts()
#21 0x7ff6d6428f56 content::BrowserMainRunnerImpl::Run()
#22 0x7ff6d6422ad4 content::BrowserMain()
#23 0x7ff6d6e1ad93 content::RunBrowserProcessMain()
#24 0x7ff6d6e1bd1e content::ContentMainRunnerImpl::Run()
#25 0x7ff6d9820baf service_manager::Main()
#26 0x7ff6d6e19dd4 content::ContentMain()

The same crash happens whether the dot was used in the sign in or not.