I've installed Dev Channel Chrome version 31.0.1612.1 dev-m Aura, and by accident I clicked the option to re-launch the browser in Windows 8 mode. I've found answers saying that there should be a corresponding option in the Chrome menu to re-launch the browser in desktop mode, but I can't see any such option! I've also tried to edit the registry, to no effect.
This is what my Chrome menu looks like: