Revert 76228 - Move core pieces of geolocation from chrome to content.This is...

content/browser/geolocation/network_location_provider.h

-// Copyright (c) 2010 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 CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
-#define CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_
-#pragma once
-
-#include <list>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/ref_counted.h"
-#include "base/scoped_ptr.h"
-#include "base/string16.h"
-#include "base/threading/thread.h"
-#include "chrome/common/geoposition.h"
-#include "content/browser/geolocation/device_data_provider.h"
-#include "content/browser/geolocation/location_provider.h"
-#include "content/browser/geolocation/network_location_request.h"
-
-class URLFetcherProtectEntry;
-
-class NetworkLocationProvider
-    : public LocationProviderBase,
-      public GatewayDataProvider::ListenerInterface,
-      public RadioDataProvider::ListenerInterface,
-      public WifiDataProvider::ListenerInterface,
-      public NetworkLocationRequest::ListenerInterface {
- public:
-  // Cache of recently resolved locations. Public for tests.
-  class PositionCache {
-   public:
-    // The maximum size of the cache of positions for previously requested
-    // device data.
-    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 GatewayData& gateway_data,
-                       const WifiData& wifi_data,
-                       const Geoposition& position);
-
-    // Searches for a cached position response for the current set of device
-    // 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 GatewayData& gateway_data,
-                                    const WifiData& wifi_data);
-
-   private:
-    // Makes the key for the map of cached positions, using a set of
-    // device data. Returns true if a good key was generated, false otherwise.
-    static bool MakeKey(const GatewayData& gateway_data,
-                        const WifiData& wifi_data,
-                        string16* key);
-
-    // The cache of positions. This is stored as a map keyed on a string that
-    // represents a set of device data, and a list to provide
-    // least-recently-added eviction.
-    typedef std::map<string16, Geoposition> CacheMap;
-    CacheMap cache_;
-    typedef std::list<CacheMap::iterator> CacheAgeList;
-    CacheAgeList cache_age_list_;  // Oldest first.
-  };
-
-  NetworkLocationProvider(AccessTokenStore* access_token_store,
-                          URLRequestContextGetter* context,
-                          const GURL& url,
-                          const string16& access_token);
-  virtual ~NetworkLocationProvider();
-
-  // LocationProviderBase implementation
-  virtual bool StartProvider(bool high_accuracy);
-  virtual void StopProvider();
-  virtual void GetPosition(Geoposition *position);
-  virtual void UpdatePosition();
-  virtual void OnPermissionGranted(const GURL& requesting_frame);
-
- private:
-  // Satisfies a position request from cache or network.
-  void RequestPosition();
-
-  // Internal helper used by DeviceDataUpdateAvailable
-  void OnDeviceDataUpdated();
-
-  bool IsStarted() const;
-
-  // DeviceDataProvider::ListenerInterface implementation.
-  virtual void DeviceDataUpdateAvailable(GatewayDataProvider* provider);
-  virtual void DeviceDataUpdateAvailable(RadioDataProvider* provider);
-  virtual void DeviceDataUpdateAvailable(WifiDataProvider* provider);
-
-  // NetworkLocationRequest::ListenerInterface implementation.
-  virtual void LocationResponseAvailable(const Geoposition& position,
-                                         bool server_error,
-                                         const string16& access_token,
-                                         const GatewayData& gateway_data,
-                                         const RadioData& radio_data,
-                                         const WifiData& wifi_data);
-
-  scoped_refptr<AccessTokenStore> access_token_store_;
-
-  // The device data providers, acquired via global factories.
-  GatewayDataProvider* gateway_data_provider_;
-  RadioDataProvider* radio_data_provider_;
-  WifiDataProvider* wifi_data_provider_;
-
-  // The radio and wifi data, flags to indicate if each data set is complete.
-  GatewayData gateway_data_;
-  RadioData radio_data_;
-  WifiData wifi_data_;
-  bool is_gateway_data_complete_;
-  bool is_radio_data_complete_;
-  bool is_wifi_data_complete_;
-
-  // The timestamp for the latest device data update.
-  base::Time device_data_updated_timestamp_;
-
-  // Cached value loaded from the token store or set by a previous server
-  // response, and sent in each subsequent network request.
-  string16 access_token_;
-
-  // The current best position estimate.
-  Geoposition position_;
-
-  bool is_new_data_available_;
-
-  std::string most_recent_authorized_host_;
-
-  // The network location request object, and the url it uses.
-  scoped_ptr<NetworkLocationRequest> request_;
-
-  ScopedRunnableMethodFactory<NetworkLocationProvider> delayed_start_task_;
-  // The cache of positions.
-  scoped_ptr<PositionCache> position_cache_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkLocationProvider);
-};
-
-#endif  // CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_PROVIDER_H_