After syncing to ToT, the browser process starts crashing on resource_coordinator::TabManagerDelegate::OnFocusTabScoreAdjustmentTimeout().

The crash stack looks like:

[94350:94350:0730/101716.570840:FATAL:thread_restrictions.cc(29)] Check failed: !g_blocking_disallowed.Get().Get(). Function marked as blocking was called from a scope that disallows blocking! If this task is running inside the TaskScheduler, it needs to have MayBlock() in its TaskTraits. Otherwise, consider making this blocking work asynchronous or, as a last resort, you may use ScopedAllowBlocking (see its documentation for best practices).                                                               
#0 0x7fe22d7441dd base::debug::StackTrace::StackTrace()                                                                 
#1 0x7fe22d46773c base::debug::StackTrace::StackTrace()                                                                                                                                           
#2 0x7fe22d4d0eed logging::LogMessage::~LogMessage()
#3 0x7fe22d68d64b base::AssertBlockingAllowed()                                                                                                                    
#4 0x7fe22d751644 base::PathExists()                  
#5 0x7fe22d57f872 base::AdjustOOMScore()            
#6 0x564558faa124 resource_coordinator::TabManagerDelegate::OnFocusTabScoreAdjustmentTimeout()                                                                                                   
#7 0x564555a7848d _ZN4base8internal13FunctorTraitsIMN18OAuth2TokenService7FetcherEFvvEvE6InvokeIS5_PS3_JEEEvT_OT0_DpOT1_
#8 0x564555a78404 _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIMN18OAuth2TokenService7FetcherEFvvEJPS5_EEEvOT_DpOT0_
#9 0x564555a783b5 _ZN4base8internal7InvokerINS0_9BindStateIMN18OAuth2TokenService7FetcherEFvvEJNS0_17UnretainedWrapperIS4_EEEEEFvvEE7RunImplIS6_NSt3__15tupleIJS8_EEEJLm0EEEEvOT_OT0_NSD_16integer
_sequenceImJXspT1_EEEE
#10 0x564555a78359 _ZN4base8internal7InvokerINS0_9BindStateIMN18OAuth2TokenService7FetcherEFvvEJNS0_17UnretainedWrapperIS4_EEEEEFvvEE7RunOnceEPNS0_13BindStateBaseE
#11 0x7fe22d418fbe _ZNO4base12OnceCallbackIFvvEE3RunEv
#12 0x7fe22d6943fb base::OneShotTimer::RunUserTask()
#13 0x7fe22d693f73 base::internal::TimerBase::RunScheduledTask()
#14 0x7fe22d694b29 base::internal::BaseTimerTaskInternal::Run()
#15 0x7fe22d4ac53d _ZN4base8internal13FunctorTraitsIMNS_19ImportantFileWriterEFvvEvE6InvokeIS4_PS2_JEEEvT_OT0_DpOT1_
#16 0x7fe22d4ac4b4 _ZN4base8internal12InvokeHelperILb0EvE8MakeItSoIRKMNS_19ImportantFileWriterEFvvEJPS4_EEEvOT_DpOT0_
#17 0x7fe22d4ac465 _ZN4base8internal7InvokerINS0_9BindStateIMNS_19ImportantFileWriterEFvvEJNS0_17UnretainedWrapperIS3_EEEEEFvvEE7RunImplIRKS5_RKNSt3__15tupleIJS7_EEEJLm0EEEEvOT_OT0_NSE_16integer
_sequenceImJXspT1_EEEE
#18 0x7fe22d59df79 _ZN4base8internal7InvokerINS0_9BindStateIMNS_7RunLoopEFvvEJNS0_17UnretainedWrapperIS3_EEEEEFvvEE7RunOnceEPNS0_13BindStateBaseE
#19 0x7fe22d418fbe _ZNO4base12OnceCallbackIFvvEE3RunEv
#20 0x7fe22d468aca base::debug::TaskAnnotator::RunTask()
#21 0x7fe22d4f7ae0 base::MessageLoop::RunTask()
#22 0x7fe22d4f7d25 base::MessageLoop::DeferOrRunPendingTask()
#23 0x7fe22d4f84a5 base::MessageLoop::DoDelayedWork()
#24 0x7fe22d787b72 base::MessagePumpLibevent::Run()
#25 0x7fe22d4f73ee base::MessageLoop::Run()
#26 0x7fe22d59c662 base::RunLoop::Run()
#27 0x564558826e7a ChromeBrowserMainParts::MainMessageLoopRun()
#28 0x7fe226f64dfa content::BrowserMainLoop::RunMainMessageLoopParts()
#29 0x7fe226f6bd50 content::BrowserMainRunnerImpl::Run()
#30 0x7fe226f584b0 content::BrowserMain()
#31 0x7fe228d15fb4 content::RunBrowserProcessMain()
#32 0x7fe228d187ba content::ContentMainRunnerImpl::Run()
#33 0x7fe228d0d03c content::ContentServiceManagerMainDelegate::RunEmbedderProcess()
#34 0x7fe22ef02971 service_manager::Main()
#35 0x7fe228d13195 content::ContentMain()
#36 0x56455593b246 ChromeMain
#37 0x56455593b152 main
#38 0x7fe2058832b1 __libc_start_main
#39 0x56455593b02a _start