I have a geolocation code, but chrome does not give me permission to run it

I'd like to know, your I have to give some sort of permission, for the code to work on Chrome, because in Mozilla it can give me the location. Follow the code below '

function writeAddressName(latLng) {
    var geocoder = new google.maps.Geocoder();
    geocoder.geocode({
    "location": latLng

    },
    function(results, status) {
      if (status == google.maps.GeocoderStatus.OK)
        document.getElementById("address").innerHTML = results[0].formatted_address;
      else
        document.getElementById("error").innerHTML += "Unable to retrieve your address" + "<br />";
    });
  }



  function geolocationSuccess(position) {
    var userLatLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
    // Escreva o endereço da localização
    writeAddressName(userLatLng);





    // Coloque o marcador na posição do usuario
      new google.maps.Marker({
      map: map,
      icon:'img/aqui',
      position: userLatLng

    });


    // Desenhe um círculo em torno da posição do usuário para ter uma idéia da precisão de localização atual
    var circle = new google.maps.Circle({
      center: userLatLng,
      radius: 500,
      map: map,
      fillColor: '#0000FF',
      fillOpacity: 0.3,
      strokeColor: '#0000FF',
      strokeOpacity: 1.0,


    });
    map.fitBounds(circle.getBounds());
  }

  function geolocationError(positionError) {
    document.getElementById("error").innerHTML += "Error: " + positionError.message + "<br />";
  }

  function geolocateUser() {
    // Verifica se o navegador suportar a Geolocation API
    if (navigator.geolocation)
    {
      var positionOptions = {
        enableHighAccuracy: true,
        timeout: 10 * 1000 // 10 seconds

      };
      navigator.geolocation.getCurrentPosition(geolocationSuccess, geolocationError, positionOptions);
    }
    else
      document.getElementById("error").innerHTML += "Your browser doesn't support the Geolocation API";
  }

  window.onload = geolocateUser;