title: wkwebview with location services
body: <p>Ive been experimenting with swift and wanted to try out the wkwebview. 
  Ive built an app and it all works correctly but the problem is that the webpage that i load into my wkwebview uses google maps and requires location services, so the javascript should prompt a message saying  "this app requires your location information". 
  The swift app  wkwebview doesnt display any message doesnt display my google maps either. If i visit the url with the safari browser it prompts the location message and also in uiwebview on ios 7 it promps that message. 
  Anyone else come accross this and know a solution?</p>