title: fromLatLngToPoint is not defined
body: <p>I am Currently working with Google maps and When I try to customize Google Map tooltip in my code then it gives me an error
  <strong>fromLatLngToPoint is not defined</strong>
  Have searched and tried some solution but didn't get a solution. </p>
  
  <p>here is my code</p>
  
  <pre><code>function initialize() 
    {
      var mapOptions = {
        zoom: 14,
        styles: [
          {
            "featureType": "water",
            "stylers": [
              { "color": "#1CA5EA" }
            ]
          },{
            "featureType": "landscape.natural",
            "stylers": [
              { "color": "#EDEDED" }
            ]
          },{
            "featureType": "landscape.man_made",
            "stylers": [
              { "color": "#E0E0E0" }
            ]
          },{
            "featureType": "road.highway",
            "stylers": [
              { "visibility": "off" }
            ]
          },{
            "featureType": "poi",
            "elementType": "geometry",
            "stylers": [
              { "visibility": "on" },
              { "gamma": 0.53 },
              { "saturation": 4 },
              { "lightness": -8 }
            ]
          },{
            "featureType": "road.local",
            "elementType": "geometry.stroke",
            "stylers": [
              { "color": "#B7B7B7" }
            ]
          },{
            "featureType": "poi.school",
            "elementType": "geometry",
            "stylers": [
              { "color": "#1CA5EA" },
              { "saturation": 15 },
              { "lightness": -53 },
              { "weight": 0.1 },
              { "gamma": 0.96 }
            ]
          },{
            "featureType": "poi",
            "elementType": "geometry.fill",
            "stylers": [
              { "gamma": 0.89 },
              { "lightness": -1 },
              { "saturation": -1 },
              { "color": "#878787" }
            ]
          },{
            "featureType": "road.arterial",
            "stylers": [
              { "visibility": "simplified" }
            ]
          },{
            "featureType": "road.local",
            "stylers": [
              { "visibility": "simplified" }
            ]
          },{
          }
        ],
        center: new google.maps.LatLng(57.70610, 11.97324),
        scrollwheel: false
      };
  
      var map = new google.maps.Map(document.getElementById('map'), mapOptions);
  
      var marker = new google.maps.Marker({
          position: new google.maps.LatLng(57.70610, 11.97324),
          map: map,
  
          title: 'This is us!'
      });
      marker.tooltipContent = 'this content should go inside the tooltip';
      var infoWindow = new google.maps.InfoWindow({
          content: 'This is an info window'
      });
  
      google.maps.event.addListener(marker, 'mouseover', function () {
          var point = fromLatLngToPoint(marker.getPosition(), map);
          $('#marker-tooltip').html(marker.tooltipContent + '&lt;br&gt;Pixel coordinates: ' + point.x + ', ' + point.y).css({
              'left': point.x,
                  'top': point.y
          }).show();
      });
    }
  </code></pre>