Reviewed-by: chegar, coffeys, vtewari

Reviewed-by: pkoppula, coffeys

Reviewed-by: jeff, prr

Reviewed-by: mullan, jnimeh, coffeys

Reviewed-by: coffeys

Reviewed-by: alanb, igerasim, rhalade, mullan

Reviewed-by: serb, jdv

Summary: The AWT Robot X11 code that takes screenshots uses the default root window, which may not contain the final composited desktop.
Reviewed-by: alexsch, ssadetsky, prr, dbuck