This theme is based on a mockup
done by ~lordalpha1
The theme works for both Metacity and Mutter. Instructions:
First, extract the zip
, then copy the theme you want, or both to ~/.themes
Chronos has an x in the corner; Chronos-nx has no x in the corner, just a red button.
Then in GNOME-Tweak-Tool or a similar utility, change the window border theme to your selected variation of Chronos.