Make navigator.geolocation.getCurrentPosition more reliable

geolocation.js

(function() {

    if (navigator.geolocation) {
        function PositionError(code, message) {
            this.code = code;
            this.message = message;
        }

        PositionError.PERMISSION_DENIED = 1;
        PositionError.POSITION_UNAVAILABLE = 2;
        PositionError.TIMEOUT = 3;
        PositionError.prototype = new Error();

        navigator.geolocation._getCurrentPosition = navigator.geolocation.getCurrentPosition;
        
        navigator.geolocation.getCurrentPosition = function(success, failure, options) {
            var successHandler = function(position) {
                if ((position.coords.latitude == 0 && position.coords.longitude == 0) ||
                    (position.coords.latitude == 37.38600158691406 && position.coords.longitude == -122.08200073242188)) 
                    return failureHandler(new PositionError(PositionError.POSITION_UNAVAILABLE, 'Position unavailable')); 

                failureHandler = function() {};
                success(position);
            }

            var failureHandler = function(error) {
                failureHandler = function() {};
                failure(error);
            }
            
            navigator.geolocation._getCurrentPosition(successHandler, failureHandler, options);

            window.setTimeout(function() { failureHandler(new PositionError(PositionError.TIMEOUT, 'Timed out')) }, 10000);
        }
    }
})();

This script works around three common problems with the getCurrentPosition() function on Smart TV's and consoles.

1. Neither the failure nor the success callback is called
2. The success callback is called with the coordinates 0,0
3. The success callback is called with the coordinates of Google's HQ in Mountain View, CA

Hi Niels,
you can put this 2 lines at line 17:
success=(success || function () {});
failure=(failure || function () {});
to check if they are undefined.