Chrome:54.0.2840.25/ChromeOS:8743.26.0 

Please specify Cr-* of the system to which this bug/feature applies (add
the label below).

Steps To Reproduce:
(1)Click on "manage screen lock " at settings window 
(2)Confirm password and click on Change PIN
(3)Enter new PIN

Expected Result:

Actual Result:
For every key press, enters double the numbers.

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)
always

What is the impact to the user, and is there a workaround? If so, what is
it?

Please provide any additional information below. Attach a screen shot or
log if possible.