Pulse the flour, sugar and salt in a food processor. Add the butter and pulse until it is the size of peas. Add the cream cheese and pulse until it is the size of peas. Add the vinegar and 2 tablespoons ice water and pulse a few times, until the dough holds together when squeezed. Gather into a ball on a sheet of plastic wrap. Pat into a disk, wrap and chill at least 4 hours.