In separate meetings today, stockholders from Marriott International and Starwood Hotels & Resorts approved the merger of the two companies. The $13.6 billion deal already has cleared regulatory hurdles in the United States and Canada and is on track to close by mid-2016. Marriott's acquisition of Starwood hit a rough patch last month, as a Chinese consortium led by Anbang Group Insurance Co. looked likely to win Starwood with a competing all-cash bid. The consortium later withdrew its offer.