Add support for cellular geolocation

chromeos/network/geolocation_handler.h

Index: chromeos/network/geolocation_handler.h
diff --git a/chromeos/network/geolocation_handler.h b/chromeos/network/geolocation_handler.h
index f962328511ff802fd717a44abd5ad385493c08f8..c0e61527dfc203559553b36a42a0dfdbb3f08f54 100644
--- a/chromeos/network/geolocation_handler.h
+++ b/chromeos/network/geolocation_handler.h
@@ -21,10 +21,11 @@ class DictionaryValue;
 
 namespace chromeos {
 
-// This class provices Shill Wifi Access Point data. It currently relies on
-// polling because that is the usage model in content::WifiDataProvider. This
-// class requests data asynchronously, returning the most recent available data.
-// A typical usage pattern, assuming a wifi device is enabled, is:
+// This class provices Shill Wifi Access Point and Cell Tower data. It
+// currently relies on polling because that is the usage model in
+// content::WifiDataProvider. This class requests data asynchronously,
+// returning the most recent available data. A typical usage pattern,
+// assuming a wifi device is enabled, is:
 //   Initialize();  // Makes an initial request
 //   GetWifiAccessPoints();  // returns true + inital data, requests update
 //   (Delay some amount of time, ~10s)
@@ -37,9 +38,17 @@ class CHROMEOS_EXPORT GeolocationHandler : public ShillPropertyChangedObserver {
  public:
   ~GeolocationHandler() override;
 
-  // This sends a request for wifi access point data. If data is already
-  // available, returns |true|, fills |access_points| with the latest access
-  // point data, and sets |age_ms| to the time since the last update in MS.
+  // This sends a request for geolocation (both wifi AP and cell tower) data.
+  // If AP data is already available, fills |access_points| with the latest
+  // access point data, and similarly for cell tower data and |cell_towers|.
+  // Returns |true| if either type of data is already available upon call.
+  bool GetNetworkInformation(WifiAccessPointVector* access_points,
+                             CellTowerVector* cell_towers);
+
+  // This sends a request for geolocation (both wifi AP and cell tower) data.
+  // If wifi data is already available, returns |true|, fills |access_points|
+  // with the latest access point data, and sets |age_ms| to the time
+  // since the last update in MS.
   bool GetWifiAccessPoints(WifiAccessPointVector* access_points,
                            int64_t* age_ms);
 
@@ -52,7 +61,7 @@ class CHROMEOS_EXPORT GeolocationHandler : public ShillPropertyChangedObserver {
  private:
   friend class NetworkHandler;
   friend class GeolocationHandlerTest;
-  friend class SimpleGeolocationWiFiTest;
+  friend class SimpleGeolocationWirelessTest;
 
   GeolocationHandler();
 
@@ -65,18 +74,23 @@ class CHROMEOS_EXPORT GeolocationHandler : public ShillPropertyChangedObserver {
   // Called from OnPropertyChanged or ManagerPropertiesCallback.
   void HandlePropertyChanged(const std::string& key, const base::Value& value);
 
-  // Asynchronously request wifi access points from Shill.Manager.
-  void RequestWifiAccessPoints();
+  // Asynchronously request geolocation objects (wifi access points and
+  // cell towers) from Shill.Manager.
+  void RequestGeolocationObjects();
 
   // Callback for receiving Geolocation data.
   void GeolocationCallback(DBusMethodCallStatus call_status,
                            const base::DictionaryValue& properties);
 
-  // Wifi enabled state
+  bool cellular_enabled_;
   bool wifi_enabled_;
 
-  // Cached wifi access points and update time
+  void AddCellTowerFromDict(const base::DictionaryValue* entry);
+  void AddAccessPointFromDict(const base::DictionaryValue* entry);
+
+  // Cached netork information and update time
   WifiAccessPointVector wifi_access_points_;
+  CellTowerVector cell_towers_;
   base::Time geolocation_received_time_;
 
   // For Shill client callbacks