UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10302.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3319.0 Safari/537.36
Platform: 10302.0.0 (Official Build) dev-channel terra

Steps to reproduce the problem:
1. no night mode in settings.  it was there acouple months ago 
2. 
3. 

What is the expected behavior?
should have night mode since im on dev channel

What went wrong?
night mode disappered around chrome 59-60

Did this work before? Yes 59-60

Chrome version: 65.0.3319.0  Channel: dev
OS Version: 10302.0.0
Flash Version: