Except, the 777 does not have fuel dumping.

It was not required for certification because it meets the minimum required climb rate with an engine failure after takeoff at Max Gross Weight.

Yes it does:

http://cdn-www.airliners.net/aviation-photos/photos/7/4/7/23...

Look at the top center, at the "Fuel Jettison" switches. (This is a 777-200 non ER, but I doubt the ER model would remove this feature.)