Quick Shrimp And Corn Chowder

Name: Quick Shrimp And Corn Chowder
Ingredients: 3 medium (1 lb., 5 oz. total) ears fresh shucked yellow corn; 2 tablespoons unsalted butter; .5 cup chopped yellow onion (from 1 small onion); 2 garlic cloves, chopped (about 2 tsp.); 1.75 cups lower-sodium chicken broth; 10 ounces (6 medium) baby red potatoes, cut into 1⁄2-inch pieces; 1 teaspoon kosher salt; .25 teaspoon black pepper; 8 ounces medium-size peeled, deveined raw shrimp; 2 tablespoons heavy cream; 2 tablespoons sliced fresh chives