Revert of Reland: Geolocation: move from content/browser to device/ (patchset #2 id:20001 of https:…

device/geolocation/network_location_provider.h

-// Copyright (c) 2012 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_NETWORK_LOCATION_PROVIDER_H_
-#define DEVICE_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
-
-#include <stddef.h>
-
-#include <list>
-#include <map>
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/strings/string16.h"
-#include "base/threading/non_thread_safe.h"
-#include "base/threading/thread.h"
-#include "device/geolocation/geolocation_export.h"
-#include "device/geolocation/geoposition.h"
-#include "device/geolocation/location_provider_base.h"
-#include "device/geolocation/network_location_request.h"
-#include "device/geolocation/wifi_data_provider_manager.h"
-
-namespace device {
-class AccessTokenStore;
-
-class NetworkLocationProvider : public base::NonThreadSafe,
-                                public LocationProviderBase {
- public:
-  // Cache of recently resolved locations. Public for tests.
-  class DEVICE_GEOLOCATION_EXPORT PositionCache {
-   public:
-    // The maximum size of the cache of positions.
-    static const size_t kMaximumSize;
-
-    PositionCache();
-    ~PositionCache();
-
-    // Caches the current position response for the current set of cell ID and
-    // WiFi data. In the case of the cache exceeding kMaximumSize this will
-    // evict old entries in FIFO orderer of being added.
-    // Returns true on success, false otherwise.
-    bool CachePosition(const WifiData& wifi_data,
-                       const Geoposition& position);
-
-    // Searches for a cached position response for the current set of data.
-    // Returns NULL if the position is not in the cache, or the cached
-    // position if available. Ownership remains with the cache.
-    const Geoposition* FindPosition(const WifiData& wifi_data);
-
-   private:
-    // Makes the key for the map of cached positions, using a set of
-    // data. Returns true if a good key was generated, false otherwise.
-    static bool MakeKey(const WifiData& wifi_data,
-                        base::string16* key);
-
-    // The cache of positions. This is stored as a map keyed on a string that
-    // represents a set of data, and a list to provide
-    // least-recently-added eviction.
-    typedef std::map<base::string16, Geoposition> CacheMap;
-    CacheMap cache_;
-    typedef std::list<CacheMap::iterator> CacheAgeList;
-    CacheAgeList cache_age_list_;  // Oldest first.
-  };
-
-  NetworkLocationProvider(
-      const scoped_refptr<AccessTokenStore>& access_token_store,
-      const scoped_refptr<net::URLRequestContextGetter>& context,
-      const GURL& url,
-      const base::string16& access_token);
-  ~NetworkLocationProvider() override;
-
-  // LocationProvider implementation
-  bool StartProvider(bool high_accuracy) override;
-  void StopProvider() override;
-  void GetPosition(Geoposition* position) override;
-  void RequestRefresh() override;
-  void OnPermissionGranted() override;
-
- private:
-  // Satisfies a position request from cache or network.
-  void RequestPosition();
-
-  // Gets called when new wifi data is available.
-  void OnWifiDataUpdate();
-
-  // Internal helper used by OnWifiDataUpdate.
-  void OnWifiDataUpdated();
-
-  bool IsStarted() const;
-
-  void OnLocationResponse(const Geoposition& position,
-                          bool server_error,
-                          const base::string16& access_token,
-                          const WifiData& wifi_data);
-
-  const scoped_refptr<AccessTokenStore> access_token_store_;
-
-  // The wifi data provider, acquired via global factories.
-  WifiDataProviderManager* wifi_data_provider_manager_;
-
-  WifiDataProviderManager::WifiDataUpdateCallback wifi_data_update_callback_;
-
-  // The  wifi data and a flag to indicate if the data set is complete.
-  WifiData wifi_data_;
-  bool is_wifi_data_complete_;
-
-  // The timestamp for the latest wifi data update.
-  base::Time wifi_timestamp_;
-
-  // Cached value loaded from the token store or set by a previous server
-  // response, and sent in each subsequent network request.
-  base::string16 access_token_;
-
-  // The current best position estimate.
-  Geoposition position_;
-
-  // Whether permission has been granted for the provider to operate.
-  bool is_permission_granted_;
-
-  bool is_new_data_available_;
-
-  // The network location request object, and the url it uses.
-  std::unique_ptr<NetworkLocationRequest> request_;
-
-  // The cache of positions.
-  const std::unique_ptr<PositionCache> position_cache_;
-
-  base::WeakPtrFactory<NetworkLocationProvider> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkLocationProvider);
-};
-
-// Factory functions for the various types of location provider to abstract
-// over the platform-dependent implementations.
-DEVICE_GEOLOCATION_EXPORT LocationProviderBase* NewNetworkLocationProvider(
-    const scoped_refptr<AccessTokenStore>& access_token_store,
-    const scoped_refptr<net::URLRequestContextGetter>& context,
-    const GURL& url,
-    const base::string16& access_token);
-
-}  // namespace device
-
-#endif  // DEVICE_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_