It's a Theme for Google Chrome to go with Amient WinStyle.
ABOUT CHROME VERSION
I don't know exactly from which version crx theme was supported. However, if you have updated your Chrome to the newest 'dev version', it works.
HOW TO INSTALL THEME
Just download the crx file with Chrome, it will be installed automatically. If not, you can drag the file into Chrome and 'save' again, it will be done.
HOW TO CHANGE THEME
Type 'chrome://extensions/' in the address field, then 'reload' the theme you want.Link to My Blog