ToT on linux desktop, target_os="chromeos"

out/Debug/chrome --ash-host-window-bounds="1280x768" --user-data-dir=/w/udd --ash-dev-shortcuts --ash-debug-shortcuts --use-first-display-as-internal --has-internal-stylus --force-enable-stylus-tools --pen-devices=10 --mus

Tap the stylus icon in the shelf, tap laser pointer, tap on screen.

[9086:9086:1026/105100.347837:FATAL:thread_restrictions.cc(105)] Check failed: !g_base_sync_primitives_disallowed.Get().Get(). Waiting on a //base sync primitive is not allowed on this thread to prevent jank and deadlock. If waiting on a //base sync primitive is unavoidable, do it within the scope of a ScopedAllowBaseSyncPrimitives. If in a test, use ScopedAllowBaseSyncPrimitivesForTesting.
#0 0x7f90bf236fbd base::debug::StackTrace::StackTrace()
#1 0x7f90bf23553c base::debug::StackTrace::StackTrace()
#2 0x7f90bf2b8b2d logging::LogMessage::~LogMessage()
#3 0x7f90bf45b1b4 base::internal::AssertBaseSyncPrimitivesAllowed()
#4 0x7f90bf3e92c3 base::WaitableEvent::TimedWaitUntil()
#5 0x7f90bf3e91f3 base::WaitableEvent::Wait()
#6 0x7f90b5289cfe ui::ClientGpuMemoryBufferManager::CreateGpuMemoryBuffer()
#7 0x7f90b096a557 ash::FastInkView::UpdateBuffer()
#8 0x7f90b096a066 ash::FastInkView::Redraw()
#9 0x7f90b091949f _ZN4base8internal13FunctorTraitsIMN3ash23DisplayAnimatorChromeOSEFvvEvE6InvokeIRKNS_7WeakPtrIS3_EEJEEEvS5_OT_DpOT0_
#10 0x7f90b097550a _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMN3ash11FastInkViewEFvvERKNS_7WeakPtrIS5_EEJEEEvOT_OT0_DpOT1_
#11 0x7f90b09754a0 _ZN4base8internal7InvokerINS0_9BindStateIMN3ash11FastInkViewEFvvEJNS_7WeakPtrIS4_EEEEEFvvEE7RunImplIRKS6_RKNSt3__15tupleIJS8_EEEJLm0EEEEvOT_OT0_NSF_16integer_sequenceImJXspT1_EEEE
#12 0x7f90b09753ec _ZN4base8internal7InvokerINS0_9BindStateIMN3ash11FastInkViewEFvvEJNS_7WeakPtrIS4_EEEEEFvvEE3RunEPNS0_13BindStateBaseE
#13 0x7f90bf1e4e01 _ZNO4base12OnceCallbackIFvvEE3RunEv
#14 0x7f90bf23b900 base::debug::TaskAnnotator::RunTask()

Maybe it just needs a base::ThreadRestrictions::ScopedAllowWait similar to ServerGpuMemoryBufferManager? I don't understand the code well enough to know if this is safe.