At 3:31 of the second period in the Sharks/Maple Leafs game, Toronto requested a Coach's Challenge to review the "Interference on the Goalkeeper" penalty that resulted in a "no goal" call.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed that Toronto's Nazem Kadri made contact with San Jose goaltender Martin Jones before the puck crossed the goal line, preventing Jones from doing his job in the crease.

Therefore the original call stands - no goal Toronto Maple Leafs and a minor penalty to Kadri.
Since the Coach's Challenge did not result in the original call being overturned, the Maple Leafs forfeit their time-out.