Add NetworkConnectionHandler class

chromeos/network/network_handler_callbacks.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 CHROMEOS_NETWORK_NETWORK_HANDLER_CALLBACKS_H_
 #define CHROMEOS_NETWORK_NETWORK_HANDLER_CALLBACKS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "chromeos/chromeos_export.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace chromeos {
 namespace network_handler {
 
 // An error callback used by both the configuration handler and the state
 // handler to receive error results from the API.
 typedef base::Callback<
   void(const std::string& error_name,
-       const scoped_ptr<base::DictionaryValue> error_data)> ErrorCallback;
+       scoped_ptr<base::DictionaryValue> error_data)> ErrorCallback;
 
 typedef base::Callback<
   void(const std::string& service_path,
        const base::DictionaryValue& dictionary)> DictionaryResultCallback;
 
 typedef base::Callback<
   void(const std::string& service_path)> StringResultCallback;
 
 // Create a DictionaryValue for passing to ErrorCallback
 CHROMEOS_EXPORT base::DictionaryValue* CreateErrorData(
     const std::string& service_path,
     const std::string& error_name,
     const std::string& error_message);
 
 // Callback for Shill errors. |path| may be blank if not relevant.
 // Logs an error and calls |error_callback| if not null.
 void ShillErrorCallbackFunction(const std::string& module,
                                 const std::string& path,
                                 const ErrorCallback& error_callback,
                                 const std::string& error_name,
                                 const std::string& error_message);
 
 }  // namespace network_handler
 }  // namespace chromeos
 
 #endif  // CHROMEOS_NETWORK_NETWORK_HANDLER_CALLBACKS_H_