Chrome Version: (copy from chrome://version)
OS: (e.g. Win7, OSX 10.9.5, etc...)

What steps will reproduce the problem?
(1) In tablet overview mode, tap on a window item and drag it around but do not snap the window
(2) Release the tap

What is the expected result?
Window item should return to its previous position in window grid

What happens instead?
Chrome crashes

Call stack:

#0  ui::Layer::GetTargetOpacity () at ../../ui/compositor/layer.cc:524
#1  0x00005a3f11c5555d in ash::WindowSelectorItem::CaptionContainerView::AnimateLayerOpacity () at ../../ash/wm/overview/window_selector_item.cc:601
#2  0x00005a3f11c56ba0 in SetCloseButtonVisibility () at ../../ash/wm/overview/window_selector_item.cc:518
#3  OnSelectorItemDragEnded (this=0x3c5ddf39da80)
    at ../../ash/wm/overview/window_selector_item.cc:795
#4  ResetDraggedWindowGesture (this=0x3c5ddf39da80)
    at ../../ash/wm/overview/window_selector_item.cc:936
#5  ash::(anonymous namespace)::ShieldButton::OnGestureEvent (this=<optimized out>, 
    event=0x3c5de10b5b60) at ../../ash/wm/overview/window_selector_item.cc:242
#6  0x00005a3f10377292 in DispatchEvent () at ../../ui/events/event_dispatcher.cc:191
#7  ui::EventDispatcher::ProcessEvent (this=0x7ffc17b47a60, target=0x3c5de1058c28, 
    event=0x3c5de10b5b60) at ../../ui/events/event_dispatcher.cc:139
#8  0x00005a3f1037709c in DispatchEventToTarget (this=0x3c5de1c4d768, 
    target=0x3c5de1058c28, event=0x3c5de10b5b60)
    at ../../ui/events/event_dispatcher.cc:86
#9  ui::EventDispatcherDelegate::DispatchEvent (this=0x3c5de1c4d768, 
    target=0x3c5de1058c28, event=0x3c5de10b5b60)
    at ../../ui/events/event_dispatcher.cc:58
#10 0x00005a3f130be66f in ui::EventProcessor::OnEventFromSource (this=0x3c5de1c4d768, 
    event=0x3c5de1e8ec40) at ../../ui/events/event_processor.cc:57
#11 0x00005a3f10377ab4 in DeliverEventToSink (this=0x3c5ddcdcf148, 
    event=0x3c5de1e8ec40) at ../../ui/events/event_source.cc:73
#12 ui::EventSource::SendEventToSink (this=0x3c5ddcdcf148, event=<optimized out>)
    at ../../ui/events/event_source.cc:51
#13 0x00005a3f10377292 in DispatchEvent (this=0x7ffc17b47bf0, handler=0x3c5ddef959c8, 
    event=<optimized out>) at ../../ui/events/event_dispatcher.cc:191
#14 ui::EventDispatcher::ProcessEvent (this=0x7ffc17b47bf0, target=0x3c5ddefe4520, 
    event=0x3c5de1e8ec40) at ../../ui/events/event_dispatcher.cc:139
#15 0x00005a3f1037709c in DispatchEventToTarget (this=0x3c5ddc65b640, 
    target=0x3c5ddefe4520, event=0x3c5de1e8ec40)
    at ../../ui/events/event_dispatcher.cc:86

Seems caused by https://chromium-review.googlesource.com/c/chromium/src/+/911849. Sammie, could you take a look?