At least one NFL draft expert is predicting that new Chargers coach Jim Harbaugh will have a very successful first round later this month. In fact, Field Yates, one of the ESPN NFL Draft gurus, believes that the Chargers will end up with two first round picks thanks to a trade they make with the Minnesota Vikings. And with those selections, Harbaugh gets a coveted offensive tackle in Alabama’s JC Latham and a wide receiver in Adonai Mitchell, the former Texas Longhorn. Fields made these predictions earlier this week when he introduced his two-round mock draft. It’s all fluid, considering the N…