Remove last usage functions from HostContentSettingsMap and clean up prefs

device/geolocation/geolocation_service_context.cc

Index: device/geolocation/geolocation_service_context.cc
diff --git a/device/geolocation/geolocation_service_context.cc b/device/geolocation/geolocation_service_context.cc
index 1cb5e0d495458f1edbef395aae6c38ac7da8e391..b1bb14bd9f5e807ff371ed9b5fedbc369494efdf 100644
--- a/device/geolocation/geolocation_service_context.cc
+++ b/device/geolocation/geolocation_service_context.cc
@@ -16,10 +16,9 @@ GeolocationServiceContext::GeolocationServiceContext() {}
 GeolocationServiceContext::~GeolocationServiceContext() {}
 
 void GeolocationServiceContext::CreateService(
-    const base::Closure& update_callback,
     mojo::InterfaceRequest<mojom::GeolocationService> request) {
   GeolocationServiceImpl* service =
-      new GeolocationServiceImpl(std::move(request), this, update_callback);
+      new GeolocationServiceImpl(std::move(request), this);
   services_.push_back(base::WrapUnique<GeolocationServiceImpl>(service));
   if (geoposition_override_)
     service->SetOverride(*geoposition_override_.get());