Seen browser while moving around window overview mode animations.

Crash report: https://crash.corp.google.com/browse?q=ReportID%3D%27de984d1828a3eb4e%27&stbtiq=&reportid=&index=0

	0x000057cb88e78d54	(chrome -layer_animator.cc:111 )	ui::LayerAnimator::SetTransform(gfx::Transform const&)
0x000057cb89ce5c3f	(chrome -overview_window_animation_observer.cc:19 )	ash::OverviewWindowAnimationObserver::OnImplicitAnimationsCompleted()
0x000057cb88e76f2e	(chrome -layer_animation_observer.cc:97 )	ui::ImplicitAnimationObserver::OnLayerAnimationEnded(ui::LayerAnimationSequence*)
0x000057cb88e779e0	(chrome -layer_animation_sequence.cc:279 )	ui::LayerAnimationSequence::NotifyEnded()
0x000057cb88e7b2b0	(chrome -layer_animator.cc:462 )	ui::LayerAnimator::FinishAnimation(ui::LayerAnimationSequence*, bool)
0x000057cb88e7ba97	(chrome -layer_animator.cc:493 )	ui::LayerAnimator::Step(base::TimeTicks)
0x000057cb88e7d008	(chrome -layer_animator_collection.cc:54 )	ui::LayerAnimatorCollection::OnAnimationStep(base::TimeTicks)
0x000057cb88e6fef0	(chrome -compositor.cc:545 )	ui::Compositor::BeginMainFrame(viz::BeginFrameArgs const&)
0x000057cb88b7949c	(chrome -single_thread_proxy.cc:769 )	cc::SingleThreadProxy::DoBeginMainFrame(viz::BeginFrameArgs const&)
0x000057cb88b79ce5	(chrome -single_thread_proxy.cc:731 )	cc::SingleThreadProxy::BeginMainFrame(viz::BeginFrameArgs const&)
0x000057cb85780a88	(chrome -callback.h:95 )	base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*)
0x000057cb85782092	(chrome -message_loop.cc:395 )	base::MessageLoop::RunTask(base::PendingTask*)
0x000057cb857826bf	(chrome -message_loop.cc:407 )	base::MessageLoop::DoWork()
0x000057cb85782a88	(chrome -message_pump_libevent.cc:220 )	base::MessagePumpLibevent::Run(base::MessagePump::Delegate*)
0x000057cb87a197f4	(chrome -run_loop.cc:133 )	unsigned long const& std::__1::max<unsigned long>(unsigned long const&, unsigned long const&)
0x000057cb876c9d47	(chrome -chrome_browser_main.cc:2199 )	ChromeBrowserMainParts::MainMessageLoopRun(int*)
0x000057cb861c5643	(chrome -browser_main_loop.cc:1104 )	content::BrowserMainLoop::RunMainMessageLoopParts()
0x000057cb861c82e1	(chrome -browser_main_runner.cc:160 )	content::BrowserMainRunnerImpl::Run()
0x000057cb861c1678	(chrome -browser_main.cc:46 )	content::BrowserMain(content::MainFunctionParams const&)
0x000057cb876b5a42	(chrome -content_main_runner.cc:703 )	content::ContentMainRunnerImpl::Run()
0x000057cb876beef6	(chrome -main.cc:453 )	service_manager::Main(service_manager::MainParams const&)
0x000057cb876b4620	(chrome -content_main.cc:19 )	content::ContentMain(content::ContentMainParams const&)
0x000057cb8582e25b	(chrome -chrome_main.cc:101 )	ChromeMain
0x0000797127a32735	(libc-2.23.so -libc-start.c:289 )	__libc_start_main
0x000057cb8582e0d8	(chrome + 0x010a30d8 )	_start
0x00007ffda40fe277