UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2739.0 Safari/537.36

Example URL:
https://dvcs.w3.org/hg/d4e/raw-file/tip/key-event-test.html

Steps to reproduce the problem:
1. Add Portuguese of Brazil keyboard layout into your Windows environment from Control Panel's "Add a language" and activate it.
2. Connect ABNT keyboard or Japanese Mac Keyboard (they have keys for both decimal and separator).
3. Press "." and "," with NumLock state.

What is the expected behavior?
Those key values should be same as actually inputted characters without any modifier keys. I.e., should be "." for "." (separator), "," for "," (decimal).

What went wrong?
Looks like that these key values are computed from the code values or scancode. I can input characters correctly with the keys but the key values are wrong.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? No 

Does this work in other browsers? Yes 

Chrome version: 52.0.2739.0  Channel: dev
OS Version: 10.0
Flash Version: Shockwave Flash 22.0 r0

I guess that other printable keys on numpad also mapped from scancode or code value. However, I don't know some keyboard layouts which input different characters from ANSI keyboard's labels.