MacRumors was digging through the latest developer beta of Mac OS X Lion when it found a rather intriguing new option -- if you choose "Restart to Safari" on the user lock screen, the computer will reboot into a mode which consists entirely of the web browser. If that sounds familiar, perhaps you've heard of Google's Chrome OS, a partially-fledged operating system that runs within the browser itself but we haven't heard Apple express a desire for any such thing. Now, certainly we've seen a number of Windows desktops and laptops ship with a secondary, browser-centric OS like
