I'm seeing a context_lost flake happening pretty consistently starting yesterday (5/17). Here is the callstack:

Backtrace:
	(No symbol) [0x00000000]
	(No symbol) [0x5B5034E1]
	gpu::gles2::GLES2DecoderImpl::DoBindTexture [0x5CCF431C+369]
	RtlFreeHeap [0x7794E023+126]
	HeapFree [0x753A14BD+20]
	free [0x5C3428C7+20]
	gpu::gles2::GLES2DecoderImpl::GenTexturesHelper [0x5CCFD3AE+152]
	gpu::gles2::GLES2DecoderImpl::HandleBindTexture [0x5CD001C4+89]
	gpu::gles2::GLES2DecoderImpl::DoCommandsImpl<0> [0x5CCEC98E+197]
	gpu::CommandParser::ProcessCommands [0x5CCDB6FD+49]
	gpu::CommandExecutor::PutChanged [0x5CCDC2BB+484]
	gpu::CommandBufferService::Flush [0x5CCDBAB5+30]
	gpu::GpuCommandBufferStub::OnAsyncFlush [0x5CDE1C86+345]
	IPC::MessageT<GpuCommandBufferMsg_AsyncFlush_Meta,std::tuple<int,unsigned int,std::vector<ui::LatencyInfo,std::allocator<ui::LatencyInfo> > >,void>::Dispatch<gpu::GpuCommandBufferStub,gpu::GpuCommandBufferStub,void,void (__thiscall gpu::GpuCommandBufferSt [0x5CDDFEB9+142]
	gpu::GpuCommandBufferStub::OnMessageReceived [0x5CDE24C5+485]
	gpu::GpuChannel::HandleMessageHelper [0x5CDDBDA3+44]
	gpu::GpuChannel::HandleMessage [0x5CDDBCE4+346]
	base::internal::InvokeHelper<1,void,base::internal::RunnableAdapter<void (__thiscall content::WebMediaPlayerMS::*)(scoped_refptr<media::VideoFrame> const &)> >::MakeItSo<base::WeakPtr<content::WebMediaPlayerMS>,scoped_refptr<media::VideoFrame> const &> [0x5D1E5A3F+48]
	base::internal::Invoker<base::IndexSequence<0,1>,base::internal::BindState<base::internal::RunnableAdapter<void (__thiscall content::WebBluetoothServiceImpl::*)(mojo::Callback<void __cdecl(enum blink::mojom::WebBluetoothError)> const &)>,void __cdecl(cont [0x5CDDDACD+45]
	base::debug::TaskAnnotator::RunTask [0x5EFF1DD7+247]
	base::MessageLoop::RunTask [0x5EF8011B+1211]
	base::MessageLoop::DoWork [0x5EF7F1D5+549]
	base::MessagePumpForUI::DoRunLoop [0x5EFC4F7A+90]
	base::MessagePumpWin::Run [0x5EFC589A+74]
	base::MessageLoop::RunHandler [0x5EF7FC57+103]
	base::RunLoop::Run [0x5EFE9DB9+41]
	base::MessageLoop::Run [0x5EF7FBE2+98]
	content::GpuMain [0x5EBF719F+1768]
	content::RunNamedProcessTypeMain [0x5EF57FEF+176]
	content::ContentMainRunnerImpl::Run [0x5EF57F0E+274]
	content::ContentMain [0x5EF57324+35]
	ChromeMain [0x5C33AC8C+108]
	MainDllLoader::Launch [0x003DE9A1+488]
	wWinMain [0x003DD88E+450]
	__scrt_common_main_seh [0x00C5B605+253] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:255)
	BaseThreadInitThunk [0x753A337A+18]
	RtlInitializeExceptionChain [0x779592B2+99]
	RtlInitializeExceptionChain [0x77959285+54]
	pre_cpp_initialization [0x00C5B4FD+17] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:188)
	(No symbol) [0xFFFDE000]