Add ResetModem method and call it once non_cellular activation is done.

chrome/browser/chromeos/cros/network_library.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 CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 1548 matching lines @@
   virtual void RequestCellularRegister(const std::string& network_id) = 0;
 
   // Change data roaming restriction for current cellular device.
   virtual void SetCellularDataRoamingAllowed(bool new_value) = 0;
 
   // Changes the active cellular carrier to the one provided, calls the closure
   // once the transition is complete.
   virtual void SetCarrier(const std::string& carrier,
                           const NetworkOperationCallback& completed) = 0;
 
+  // Resets the cellular device, calls the closure once the transition is
+  // complete.
+  virtual void ResetModem() = 0;
+
   // Return true if GSM SIM card can work only with enabled roaming.
   virtual bool IsCellularAlwaysInRoaming() = 0;
 
   // Request a scan for new wifi networks.
   virtual void RequestNetworkScan() = 0;
 
   // TODO(joth): Add GetCellTowers to retrieve a CellTowerVector.
 
   // Return true if a profile matching |type| is loaded.
   virtual bool HasProfileType(NetworkProfileType type) const = 0;
@@ skipping 151 matching lines @@
                                 const std::string& service_path) = 0;
 
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via CrosLibrary::Get().
   static NetworkLibrary* GetImpl(bool stub);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_