webkit_layout_tests failing on chromium.webkit/WebKit Win7 (dbg)

Builders failed on: 
- WebKit Win7 (dbg): 
  https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win7%20%28dbg%29


paint/invalidation/video-paint-invalidation.html ( Code Search )


Stacktrace:
[5872:5308:0928/104039.247:6615503:FATAL:PaintController.cpp(184)] Check failed: false. 
Backtrace:
	base::debug::StackTrace::StackTrace [0x01837477+55]
	base::debug::StackTrace::StackTrace [0x01836CF1+17]
	logging::LogMessage::~LogMessage [0x0188C76E+94]
	blink::PaintController::EndSubsequence [0x0B6B87E7+199]
	blink::SubsequenceRecorder::~SubsequenceRecorder [0x0DB218B2+50]
	blink::SubsequenceRecorder::`scalar deleting destructor' [0x0DB21ADF+15]
	base::internal::OptionalStorage<blink::SubsequenceRecorder,0>::~OptionalStorage<blink::SubsequenceRecorder,0> [0x0DB2184E+30]
	base::Optional<blink::SubsequenceRecorder>::~Optional<blink::SubsequenceRecorder> [0x0DB217BF+15]
	blink::PaintLayerPainter::PaintLayerContents [0x0DB252F6+5478]
	blink::PaintLayerPainter::PaintLayerContentsCompositingAllPhases [0x0DB2593B+187]
	blink::PaintLayerPainter::Paint [0x0DB229F6+374]
	blink::PaintLayerPainter::PaintChildren [0x0DB22EA0+544]
	blink::PaintLayerPainter::PaintLayerContents [0x0DB25153+5059]
	blink::PaintLayerPainter::PaintLayerContentsCompositingAllPhases [0x0DB2593B+187]
	blink::PaintLayerPainter::Paint [0x0DB229F6+374]
	blink::PaintLayerPainter::PaintChildren [0x0DB22EA0+544]
	blink::PaintLayerPainter::PaintLayerContents [0x0DB25153+5059]
	blink::PaintLayerPainter::PaintLayerContentsCompositingAllPhases [0x0DB2593B+187]
	blink::PaintLayerPainter::Paint [0x0DB229F6+374]
	blink::PaintLayerPainter::PaintChildren [0x0DB22EA0+544]
	blink::PaintLayerPainter::PaintLayerContents [0x0DB25153+5059]
	blink::CompositedLayerMapping::DoPaintTask [0x0DB95369+681]
	blink::CompositedLayerMapping::PaintContents [0x0DB9705D+1069]
	blink::GraphicsLayer::PaintWithoutCommit [0x0B3EE2E5+469]
	blink::GraphicsLayer::Paint [0x0B3EDBC9+25]
	blink::LocalFrameView::PaintGraphicsLayerRecursively [0x0D0C5BA9+153]
	blink::LocalFrameView::PaintGraphicsLayerRecursively [0x0D0C5C2E+286]
	blink::LocalFrameView::PaintGraphicsLayerRecursively [0x0D0C5C2E+286]
	blink::LocalFrameView::PaintGraphicsLayerRecursively [0x0D0C5C2E+286]
	blink::LocalFrameView::PaintGraphicsLayerRecursively [0x0D0C5C2E+286]
	blink::LocalFrameView::PaintTree [0x0D0C608F+975]
	blink::LocalFrameView::UpdateLifecyclePhasesInternal [0x0D0D46E0+1312]
	blink::LocalFrameView::UpdateAllLifecyclePhases [0x0D0D2226+38]
	blink::PageAnimator::UpdateAllLifecyclePhases [0x0DA688CD+45]
	blink::PageWidgetDelegate::UpdateAllLifecyclePhases [0x0DA6CB76+22]
	blink::WebViewImpl::UpdateAllLifecyclePhases [0x0D021191+257]
	test_runner::WebWidgetTestClient::AnimateNow [0x165AD9FF+127]
	??$Invoke@ABV?$WeakPtr@VWebWidgetTestClient@test_runner@@@base@@$$V@?$FunctorTraits@P8WebWidgetTestClient@test_runner@@AEXXZX@internal@base@@SAXP8WebWidgetTestClient@test_runner@@AEXXZABV?$WeakPtr@VWebWidgetTestClient@test_runner@@@2@@Z [0x165AD170+16]
	??$MakeItSo@ABQ8WebWidgetTestClient@test_runner@@AEXXZABV?$WeakPtr@VWebWidgetTestClient@test_runner@@@base@@$$V@?$InvokeHelper@$00X@internal@base@@SAXABQ8WebWidgetTestClient@test_runner@@AEXXZABV?$WeakPtr@VWebWidgetTestClient@test_runner@@@2@@Z [0x165AD225+53]
	base::internal::Invoker<base::internal::BindState<void (__thiscall test_runner::WebWidgetTestClient::*)(void),base::WeakPtr<test_runner::WebWidgetTestClient> >,void __cdecl(void)>::RunImpl<void (__thiscall test_runner::WebWidgetTestClient::*const &)(void) [0x165AD274+52]
	base::internal::Invoker<base::internal::BindState<void (__thiscall test_runner::WebWidgetTestClient::*)(void),base::WeakPtr<test_runner::WebWidgetTestClient> >,void __cdecl(void)>::Run [0x165ADCE4+36]
	base::OnceCallback<void __cdecl(void)>::Run [0x017E00F5+53]
	base::debug::TaskAnnotator::RunTask [0x0183C473+483]
	blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue [0x0B9E456F+1407]
	blink::scheduler::TaskQueueManager::DoWork [0x0B9E265A+1130]
	base::internal::FunctorTraits<void (__thiscall blink::scheduler::TaskQueueManager::*)(bool),void>::Invoke<base::WeakPtr<blink::scheduler::TaskQueueManager> const &,bool const &> [0x0B9D6455+37]
	base::internal::InvokeHelper<1,void>::MakeItSo<void (__thiscall blink::scheduler::TaskQueueManager::*const &)(bool),base::WeakPtr<blink::scheduler::TaskQueueManager> const &,bool const &> [0x0B9D66B6+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 [0x0B9D6783+83]
	base::internal::Invoker<base::internal::BindState<void (__thiscall blink::scheduler::TaskQueueManager::*)(bool),base::WeakPtr<blink::scheduler::TaskQueueManager>,bool>,void __cdecl(void)>::Run [0x0B9E4FC4+36]
	base::OnceCallback<void __cdecl(void)>::Run [0x017E00F5+53]
	base::debug::TaskAnnotator::RunTask [0x0183C473+483]
	base::internal::IncomingTaskQueue::RunTask [0x018B55E2+146]
	base::MessageLoop::RunTask [0x018BECE0+512]
	base::MessageLoop::DeferOrRunPendingTask [0x018BD312+50]
	base::MessageLoop::DoWork [0x018BD9A1+289]
	base::MessagePumpDefault::Run [0x018C3228+40]
	base::MessageLoop::Run [0x018BE9DF+191]
	base::RunLoop::Run [0x01971DFA+170]
	content::RendererMain [0x12E6DFF7+743]
	content::RunNamedProcessTypeMain [0x1333FCB7+135]
	content::ContentMainRunnerImpl::Run [0x1333FB8E+414]
	content::ContentServiceManagerMainDelegate::RunEmbedderProcess [0x1333D3C4+36]


CL range: https://test-results.appspot.com/revision_range?start=504964&end=504981