Gets rid of the LocationArbitrator interface, in preference for LocationProvider.

device/geolocation/location_provider.h

 // Copyright (c) 2013 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_LOCATION_PROVIDER_H_
 #define DEVICE_GEOLOCATION_LOCATION_PROVIDER_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "device/geolocation/geoposition.h"
 
 namespace device {
 
 class LocationProvider;
 
 // The interface for providing location information.
-class LocationProvider {
+class DEVICE_GEOLOCATION_EXPORT LocationProvider {
  public:
   virtual ~LocationProvider() {}
 
   typedef base::Callback<void(const LocationProvider*, const Geoposition&)>
       LocationProviderUpdateCallback;
 
   // This callback will be used to notify when a new Geoposition becomes
   // available.
   virtual void SetUpdateCallback(
       const LocationProviderUpdateCallback& callback) = 0;
 
   // StartProvider maybe called multiple times, e.g. to alter the
   // |high_accuracy| setting. Returns false if a fatal error was encountered
   // which prevented the provider from starting.
   virtual bool StartProvider(bool high_accuracy) = 0;
 
   // Stops the provider from sending more requests.
   // Important: a LocationProvider may be instantiated and StartProvider() may
   // be called before the user has granted permission via OnPermissionGranted().
   // This is to allow underlying providers to warm up, load their internal
   // libraries, etc. No |LocationProviderUpdateCallback| can be run and no
   // network requests can be done until OnPermissionGranted() has been called.
   virtual void StopProvider() = 0;
 
   // Gets the current best position estimate.
-  virtual void GetPosition(Geoposition* position) = 0;
-
-  // Provides a hint to the provider that new location data is needed as soon
-  // as possible.
-  virtual void RequestRefresh() = 0;
+  virtual const Geoposition& GetPosition() = 0;
 
   // Called everytime permission is granted to a page for using geolocation.
   // This may either be through explicit user action (e.g. responding to the
   // infobar prompt) or inferred from a persisted site permission.
   // Note: See |StartProvider()| for more information.
   virtual void OnPermissionGranted() = 0;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_GEOLOCATION_LOCATION_PROVIDER_H_