ARLINGTON, Texas — Maybe the Cowboys will be OK without quarterback Tony Romo this time. The future of the Dallas running game with Ezekiel Elliott looks pretty good, too. Dak Prescott led scoring drives on all four Dallas possessions in the first half before throwing his first career touchdown pass in fellow rookie Elliott’s first 100-yard game, and the Cowboys beat the Chicago Bears 31-17 on Sunday night to snap an eight-game home losing streak. With his second straight win, Prescott doubled the number of victories the Cowboys (2-1) had in 14 games without the injured Romo over three seasons before the fourth-round pick showed up. Prescott’s first TD pass was a 17-yarder to Dez Bryant for a 31-10 lead in the fourth quarter, and he’s up to 99 throws without an interception to start his career.