[Suggestion] Pull Native Theme/Dark Mode code

[JenN]

Chromium recently added a 'native' theme that will copy which color mode you are using on your Windows 10 OS, along with the special launch parameter -force-dark-mode to put it into dark mode regardless. This would be amazingly good for my eyes.

You can find the code here, please add it in ASAP: https://github.com/chromium/chromium/blo...eme.cc#L54