Nicely close windows in xmonad

Normally if I close Chrome by clicking on the "X" button on the upper right (in window managers other than xmonad, obviously), if I later reopen Chrome then it shows me all my tabs again.

However in xmonad, if I close Chrome with mod+shift+c and then reopen it my previous tabs are gone and I have to re-open them using the recently closed tabs menu. This indicates to me that Chrome is not getting closed in the same way as when I click on the "X" button.

Since xmonad hides said "X" button, how can I close windows in the same way that I would if I clicked on the "X" button?