Reproducible on a MacBook Pro touchbar with external monitor.

Chrome Version       : 73.0.3664.3
OS Version: OS X 10.14.2

What steps will reproduce the problem?
1. Install a PWA (I'm using Calendar with open as window = true) on your Mac laptop
2. Have an external monitor attached
3. Run the PWA and press the green traffic light to send it fullscreen
4. Unplug the external monitor
5. Hover the mouse at the top of the screen

What is the expected result?

The window controls animate in from the top, allowing you to exit fullscreen

What happens instead of that?

No controls animate in. The only way to exit fullscreen is to quit the app or use 3 dot menu -> Open in Chrome

I noticed this because I use a docked laptop setup: I'm constantly plugging my laptop into the monitor and disconnecting it all day. I don't constantly enter or exit fullscreen with Calendar (I leave it fullscreen), but I have a habit of checking the hover in animation. This is definitely not a launch blocker so marking as P3.

You can end up in this situation too if you start off with no monitor attached, and then plug it in after sending the PWA fullscreen.


UserAgentString: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3664.3 Safari/537.36