If target is Google Maps, position is impossible to get

I tried this code

`final flutterWebviewPlugin = new FlutterWebviewPlugin();
var url = "https://www.google.com/maps/";
flutterWebviewPlugin.launch(
url,
withJavascript: true,
);`

The interface works fine, but it's impossible for google maps to get the position of the user.
No permissions are asked and it just doesn't work.