Google have now added full-screen support to the developer builds of Google Chrome Canary.
When you click the full-screen button, Chrome becomes a proper full screen app, but your tabs, address bar, and bookmarks bar are all still visible. However the button then changes to a curtains icon which when clicked removes all window decoration from the screen, a kind of presentation mode.
Hovering at the top of the screen brings back the toolbars and the OS X menu bar as normal.
A welcome addition to Google Chrome, and impressively quick! Nice work, Google.