[CrOS Tether] Update NetworkState to include tether properties and integrate into NetworkStateHandl…

chromeos/network/network_state_handler.h

Index: chromeos/network/network_state_handler.h
diff --git a/chromeos/network/network_state_handler.h b/chromeos/network/network_state_handler.h
index 34bac738572f970ef44d7156d1aaa3b870bca3f7..267b01d9c9f61a4f6ae526cf562bdbc98c52ec0a 100644
--- a/chromeos/network/network_state_handler.h
+++ b/chromeos/network/network_state_handler.h
@@ -208,7 +208,19 @@ class CHROMEOS_EXPORT NetworkStateHandler
   // refer to and fetch this NetworkState in the future.
   // NOTE: only GetNetworkStateFromGuid is supported to fetch "tether"
   // NetworkStates.
-  void AddTetherNetworkState(const std::string& guid, const std::string& name);
+  void AddTetherNetworkState(const std::string& guid,
+                             const std::string& name,
+                             const std::string& carrier,
+                             int battery_percentage,
+                             int signal_strength);
+
+  // Updates the tether properties (carrier, battery percentage, and signal
+  // strength) for a network which has already been added via
+  // AddTetherNetworkState. Returns whether the update was successful.
+  bool UpdateTetherNetworkProperties(const std::string& guid,
+                                     const std::string& carrier,
+                                     int battery_percentage,
+                                     int signal_strength);
 
   // Remove a Tether NetworkState, using the same |guid| passed to
   // AddTetherNetworkState.