[Suggestion] Pull Native Theme/Dark Mode code

[papadoc]

Hey, what's the deal with the --force-dark-mode switch? I just grabbed the beta and tried adding it in the startup command line in settings. The close/min/max buttons changed slightly, but that's it. Tried adding the switch to the taskbar shortcut target, but I see the same thing.

I have the same version of regular Chromium 72.0.3626.121, and if I add the switch, I get a dark URL bar. I know a lot of menus and internal pages aren't dark in v72, but the URL bar definitely should be, right? Why isn't the command line switch working as expected?

Thanks for the update, btw.