B777 droops the ailerons 5 degrees in cruise to do the same thing.
I think you'll find the aileron droop on the B777 is only 2°. The feature was first designed into the B777-300ER and was later made available as part of a Performance Improvement Package for older versions of the aircraft. According to Boeing: "This software-based modification reduces drag by creating higher aerodynamic loading on the outboard part of the wing and making the spanwise loading more elliptical. As the aileron droops, the increased loading also causes a wing twist change that reduces the local flow incidence toward the wingtip. This reduces the shock strength on the outboard wing, thereby reducing drag even further."