Google Chrome As An OS
Most should already have figured this out by now, but John Gruber finds a entry in the Chromium Developer Documentation that is Spot on:
In the long term, we think of Chromium as a tabbed window manager or shell for the web rather than a browser application. We avoid putting things into our UI in the same way you would hope that Apple and Microsoft would avoid putting things into the standard window frames of applications on their operating systems.