After reviewing all available replays and consulting with the Referee, the Situation Room determined that Shaw made deliberate contact with Campbell outside the crease, which prevented him from doing his job, in accordance with Rule 69.4 which states in part: "If an attacking player initiates any contact with a goalkeeper, other than incidental contact, while the goalkeeper is outside of his goal crease, and a goal is scored, the goal will be disallowed."
Therefore the original call is overturned - no goal Montreal Canadiens.
Since the Coach's Challenge resulted in the original call being overturned, the Los Angeles Kings retain their time-out.