UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Steps to reproduce the problem:
In test image:
cros hwid 'ABC 123456'; reboot;

What is the expected behavior?
type 'crossystem hwid', we should expect output 'ABC 123456'

What went wrong?
The hwid write function doesn't work as expected.

Did this work before? Yes 

Chrome version:   Channel: stable
OS Version: 
Flash Version: