UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36

Steps to reproduce the problem:
1. Have a window in Mac fullscreen mode.
2. Press Cmd-F.
3. Press Esc.

What is the expected behavior?
Exit find-in-page mode.

What went wrong?
The find controls stay onscreen and the window exits fullscreen mode.

Did this work before? N/A 

Chrome version: 54.0.2840.98  Channel: stable
OS Version: OS X 10.12.1
Flash Version: Shockwave Flash 23.0 r0

This started happening when I upgraded to macOS Sierra. I have only tested on the one such machine I have handy, so apologies if this turns out not reproducible.