Iran has no border to the Med.
Romney's suggestion is that Iran needs Syria to create a Med seaport.
However, the geography doesn't work. Iran does not border Syria. The only way to use Syria as a seaport for Iranian oil would be to take over either Iraq or Turkey. Good Luck with that.
At first I thought this was just a mistake, a slip-of-the-tongue, but it turns out that Romney has been saying the same thing since it was first reported in April of 2012. So either he is still denying the geography or he knows some secret thing about Iraq and their plans to invade Iran or Turkey,
LA Times, Washington Post