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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_
      6 #define CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_H_
      7 
      8 #include "content/common/content_export.h"
      9 
     10 namespace content {
     11 
     12 // This class is responsible for handling updates from multiple underlying
     13 // providers and resolving them to a single 'best' location fix at any given
     14 // moment.
     15 class CONTENT_EXPORT LocationArbitrator {
     16 public:
     17   virtual ~LocationArbitrator() {};
     18 
     19   // See more details in geolocation_provider.
     20   virtual void StartProviders(bool use_high_accuracy) = 0;
     21   virtual void StopProviders() = 0;
     22 
     23   // Called everytime permission is granted to a page for using geolocation.
     24   // This may either be through explicit user action (e.g. responding to the
     25   // infobar prompt) or inferred from a persisted site permission.
     26   // The arbitrator will inform all providers of this, which may in turn use
     27   // this information to modify their internal policy.
     28   virtual void OnPermissionGranted() = 0;
     29 
     30   // Returns true if this arbitrator has received at least one call to
     31   // OnPermissionGranted().
     32   virtual bool HasPermissionBeenGranted() const = 0;
     33 };
     34 
     35 }  // namespace content
     36 
     37 #endif  // CONTENT_BROWSER_GEOLOCATION_LOCATION_ARBITRATOR_IMPL_H_
     38