Need to add set style feature to Google Layer #1522

OpenLayers.Layer.Google.prototype.setstyle = function () {
              this.type = 'styled';
              var mapStyle = [];
              var styledMapType = new window.google.maps.StyledMapType(mapStyle, { name: "styled" });
              var googleMapObj = mapLayer.mapObject;
              googleMapObj.mapTypes.set('styled', styledMapType);
              googleMapObj.setMapTypeId('styled');
}