//南西座標
var sw = new google.maps.LatLng(43.292501,-80.543175);
//北東座標
var ne = new google.maps.LatLng(43.605057,-80.156250);
var zoneBounds = new google.maps.LatLngBounds(sw,ne);
var request = {
  bounds: zoneBounds,
  types : ['store']
};