In https://build.chromium.org/p/chromium.gpu.fyi/builders/Win10%20Debug%20%28NVIDIA%29/builds/1846
WebglConformance_conformance_ogles_GL_swizzlers_swizzlers_057_to_064 failed during webgl_conformance_d3d11_passthrough_tests
WebglConformance_conformance_ogles_GL_swizzlers_swizzlers_017_to_024 failed during webgl_conformance_tests

Same crash in both:
	v8::internal::RememberedSetUpdatingItem<v8::internal::MajorNonAtomicMarkingState>::CheckAndUpdateOldToNewSlot<1> [0x189DBC67+39]
	v8::internal::SlotSet::Iterate<<lambda_ad1b48bfd15399d01548b8de55983cc2> > [0x189DE8B9+121]
	v8::internal::RememberedSetUpdatingItem<v8::internal::MajorNonAtomicMarkingState>::UpdateUntypedPointers [0x189FE92A+58]
	v8::internal::RememberedSetUpdatingItem<v8::internal::MajorNonAtomicMarkingState>::Process [0x189F9179+25]
	v8::internal::PointersUpatingTask::RunInParallel [0x189FC51A+26]
	v8::internal::ItemParallelJob::Task::RunInternal [0x189B7E88+8]
	v8::internal::ItemParallelJob::Run [0x189B7C60+256]
	v8::internal::MarkCompactCollector::UpdatePointersAfterEvacuation [0x189FDB1F+1119]
	v8::internal::MarkCompactCollector::Evacuate [0x189F080B+603]
	v8::internal::MarkCompactCollector::CollectGarbage [0x189EDD3B+219]
	v8::internal::Heap::MarkCompact [0x189AFA75+133]
	v8::internal::Heap::PerformGarbageCollection [0x189B1794+644]
	v8::internal::Heap::CollectGarbage [0x189A02EE+478]
	v8::internal::Heap::FinalizeIncrementalMarkingIfComplete [0x189A904E+350]
	v8::internal::IncrementalMarkingJob::Task::RunInternal [0x189CADB5+261]
	v8::internal::CancelableTask::Run [0x1846A6F3+51]
	??$Invoke@PAVTask@v8@@$$V@?$FunctorTraits@P8Task@v8@@AEXXZX@internal@base@@SAXP8Task@v8@@AEXXZ$$QAPAV34@@Z [0x183D8E0B+11]
	base::internal::InvokeHelper<0,void>::MakeItSo<void (__thiscall v8::Task::*const &)(void),v8::Task *> [0x183D8EE4+36]
	base::internal::Invoker<base::internal::BindState<void (__thiscall v8::Task::*)(void),base::internal::OwnedWrapper<v8::Task> >,void __cdecl(void)>::RunImpl<void (__thiscall v8::Task::*const &)(void),std::tuple<base::internal::OwnedWrapper<v8::Task> > cons [0x183D9099+137]
	base::internal::Invoker<base::internal::BindState<void (__thiscall v8::Task::*)(void),base::internal::OwnedWrapper<v8::Task> >,void __cdecl(void)>::Run [0x183DDB04+36]
	base::OnceCallback<void __cdecl(void)>::Run [0x1004BB25+53]
	base::debug::TaskAnnotator::RunTask [0x100B6AA7+519]
	blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue [0x1C674008+1400]
	blink::scheduler::TaskQueueManager::DoWork [0x1C672109+1049]
	base::internal::FunctorTraits<void (__thiscall blink::scheduler::TaskQueueManager::*)(bool),void>::Invoke<base::WeakPtr<blink::scheduler::TaskQueueManager> const &,bool const &> [0x1C663FF5+37]
	base::internal::InvokeHelper<1,void>::MakeItSo<void (__thiscall blink::scheduler::TaskQueueManager::*const &)(bool),base::WeakPtr<blink::scheduler::TaskQueueManager> const &,bool const &> [0x1C664256+70]
	base::internal::Invoker<base::internal::BindState<void (__thiscall blink::scheduler::TaskQueueManager::*)(bool),base::WeakPtr<blink::scheduler::TaskQueueManager>,bool>,void __cdecl(void)>::RunImpl<void (__thiscall blink::scheduler::TaskQueueManager::*cons [0x1C6643C0+160]
	base::internal::Invoker<base::internal::BindState<void (__thiscall blink::scheduler::TaskQueueManager::*)(bool),base::WeakPtr<blink::scheduler::TaskQueueManager>,bool>,void __cdecl(void)>::Run [0x1C674A94+36]
	base::OnceCallback<void __cdecl(void)>::Run [0x1004BB25+53]
	base::debug::TaskAnnotator::RunTask [0x100B6AA7+519]
	base::internal::IncomingTaskQueue::RunTask [0x1012E825+37]
	base::MessageLoop::RunTask [0x10138320+512]
	base::MessageLoop::DeferOrRunPendingTask [0x10136972+50]
	base::MessageLoop::DoWork [0x10136FE6+278]
	base::MessagePumpDefault::Run [0x1013D148+40]
	base::MessageLoop::Run [0x1013801F+191]
	base::RunLoop::Run [0x101FC76A+186]
	content::RendererMain [0x136085EA+730]
	content::RunNamedProcessTypeMain [0x13B290F7+135]
	content::ContentMainRunnerImpl::Run [0x13B28FCE+414]
	content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x13B26B74+36]
	service_manager::Main [0x0C3C9157+823]
	content::ContentMain [0x13B270C9+41]
	ChromeMain [0x04592CB5+277]
	MainDllLoader::Launch [0x00432544+836]
	wWinMain [0x0042D2AB+747]
	invoke_main [0x004F278E+30] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:118)
	__scrt_common_main_seh [0x004F25F0+336] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253)
	__scrt_common_main [0x004F248D+13] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:296)
	wWinMainCRTStartup [0x004F27A8+8] (f:\dd\vctools\crt\vcstartup\src\startup\exe_wwinmain.cpp:17)
	BaseThreadInitThunk [0x763238F4+36]
	RtlUnicodeStringToInteger [0x77975DE3+595]
	RtlUnicodeStringToInteger [0x77975DAE+542]

Two v8 rolls in blamelist:
https://chromium-review.googlesource.com/651491
https://chromium-review.googlesource.com/652106

Will continue observing to see if all WebglConformance_conformance_ogles_GL_swizzlers_swizzlers need to be disabled.