Remove last usage functions from HostContentSettingsMap and clean up prefs

device/geolocation/geolocation_service_impl.h

Index: device/geolocation/geolocation_service_impl.h
diff --git a/device/geolocation/geolocation_service_impl.h b/device/geolocation/geolocation_service_impl.h
index 305920e9e7397dd4d3c91e174f8cd854ee35787a..60ce117a3c8129cf6edf3e6485e5a782fbd533f1 100644
--- a/device/geolocation/geolocation_service_impl.h
+++ b/device/geolocation/geolocation_service_impl.h
@@ -25,8 +25,7 @@ class GeolocationServiceImpl : public mojom::GeolocationService {
   // is being used.
   GeolocationServiceImpl(
       mojo::InterfaceRequest<mojom::GeolocationService> request,
-      GeolocationServiceContext* context,
-      const base::Closure& update_callback);
+      GeolocationServiceContext* context);
   ~GeolocationServiceImpl() override;
 
   // Starts listening for updates.
@@ -57,10 +56,6 @@ class GeolocationServiceImpl : public mojom::GeolocationService {
   GeolocationServiceContext* context_;
   std::unique_ptr<GeolocationProvider::Subscription> geolocation_subscription_;
 
-  // Callback that allows the instantiator of this class to be notified on
-  // position updates.
-  base::Closure update_callback_;
-
   // The callback passed to QueryNextPosition.
   QueryNextPositionCallback position_callback_;