OpenStreetMap.org Use GoogleMapAPI on the “Show My Location” Feature

No, it doesn't. It requests a location from the location providers registered in the browser; it is the browser internally requesting a position from Google - which is beyond the control of the webpage.

"Martin Fourcade ‏@mfourcade my bad buddys of @openstreetmap. it seems to be chromium (not chrome) that issued this request to gmap via the html geo api..."