[1:1:0503/173341:FATAL:multibuffer_data_source.cc(573)] Check failed: preload + kPreloadHighExtra <= pin_forwards (22020096 vs. 20930330)
#0 0x7f81e2bf9dce base::debug::StackTrace::StackTrace()
#1 0x7f81e2c1a1fb logging::LogMessage::~LogMessage()
#2 0x7f81d86d7876 media::MultibufferDataSource::UpdateBufferSizes()
#3 0x7f81d86d8ef2 media::MultibufferDataSource::SetBitrateTask()
#4 0x7f81d86c337f _ZN4base8internal7InvokerINS_13IndexSequenceIJLm0ELm1EEEENS0_9BindStateINS0_15RunnableAdapterIMN5media18BufferedDataSourceEFviEEEFvPS7_iEJNS_7WeakPtrIS7_EERiEEENS0_12InvokeHelperILb1EvSA_EEFvvEE3RunEPNS0_13BindStateBaseE
#5 0x7f81e2bfaffc base::debug::TaskAnnotator::RunTask()
#6 0x7f81d8db6527 scheduler::TaskQueueManager::ProcessTaskFromWorkQueue()
#7 0x7f81d8db51a5 scheduler::TaskQueueManager::DoWork()
#8 0x7f81d8db7584 _ZN4base8internal7InvokerINS_13IndexSequenceIJLm0ELm1ELm2EEEENS0_9BindStateINS0_15RunnableAdapterIMN9scheduler16TaskQueueManagerEFvNS_9TimeTicksEbEEEFvPS7_S8_bEJNS_7WeakPtrIS7_EERS8_bEEENS0_12InvokeHelperILb1EvSB_EEFvvEE3RunEPNS0_13BindStateBaseE
#9 0x7f81e2bfaffc base::debug::TaskAnnotator::RunTask()
#10 0x7f81e2c24985 base::MessageLoop::RunTask()
#11 0x7f81e2c24ce8 base::MessageLoop::DeferOrRunPendingTask()
#12 0x7f81e2c2507b base::MessageLoop::DoWork()
#13 0x7f81e2c26a1f base::MessagePumpDefault::Run()
#14 0x7f81e2c244b1 base::MessageLoop::RunHandler()
#15 0x7f81e2c536b0 base::RunLoop::Run()
#16 0x7f81e2c235c0 base::MessageLoop::Run()
#17 0x7f81e0e8f3fe content::RendererMain()
#18 0x7f81e0faaa0b content::RunZygote()
#19 0x7f81e0faafa2 content::RunNamedProcessTypeMain()
#20 0x7f81e0fab9e3 content::ContentMainRunnerImpl::Run()
#21 0x7f81e0faa5e0 content::ContentMain()
#22 0x7f81e344534b ChromeMain
#23 0x7f81d9a47ec5 __libc_start_main
#24 0x7f81e3445221 <unknown>

Tried to load: http://xorax.sea/star2160.mp4 in a clean ToT build and hit this. Happens consistently.