Remove last usage functions from HostContentSettingsMap and clean up prefs

device/geolocation/geolocation_service_context.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_
 #define DEVICE_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "device/geolocation/geolocation_export.h"
 #include "device/geolocation/public/interfaces/geolocation.mojom.h"
 
 namespace device {
 
 class GeolocationServiceImpl;
 struct Geoposition;
 
 // Provides information to a set of GeolocationServiceImpl instances that are
 // associated with a given context. Notably, allows pausing and resuming
 // geolocation on these instances.
 class DEVICE_GEOLOCATION_EXPORT GeolocationServiceContext {
  public:
   GeolocationServiceContext();
   virtual ~GeolocationServiceContext();
 
   // Creates a GeolocationServiceImpl that is weakly bound to |request|.
-  // |update_callback| will be called when services send
-  // location updates to their clients.
-  void CreateService(const base::Closure& update_callback,
-                     mojo::InterfaceRequest<mojom::GeolocationService> request);
+  void CreateService(mojo::InterfaceRequest<mojom::GeolocationService> request);
 
   // Called when a service has a connection error. After this call, it is no
   // longer safe to access |service|.
   void ServiceHadConnectionError(GeolocationServiceImpl* service);
 
   // Enables geolocation override. This method can be used to trigger possible
   // location-specific behavior in a particular context.
   void SetOverride(std::unique_ptr<Geoposition> geoposition);
 
   // Disables geolocation override.
   void ClearOverride();
 
  private:
   std::vector<std::unique_ptr<GeolocationServiceImpl>> services_;
 
   std::unique_ptr<Geoposition> geoposition_override_;
 
   DISALLOW_COPY_AND_ASSIGN(GeolocationServiceContext);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_GEOLOCATION_GEOLOCATION_SERVICE_CONTEXT_H_