Adding error handling to ONC validation.

chrome/browser/chromeos/network_settings/onc_utils.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_NETWORK_SETTINGS_ONC_UTILS_H_
 #define CHROME_BROWSER_CHROMEOS_NETWORK_SETTINGS_ONC_UTILS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace chromeos {
 namespace onc {
 
+// A valid but empty (no networks and no certificates) and unencrypted
+// configuration.
+extern const char kEmptyUnencryptedConfiguration[];
+
 // Parses |json| according to the JSON format. If |json| is a JSON formatted
 // dictionary, the function returns the dictionary as a DictionaryValue and
 // doesn't modify |error|. Otherwise returns NULL and sets |error| to a
 // translated error message.
 scoped_ptr<base::DictionaryValue> ReadDictionaryFromJson(
     const std::string& json,
     std::string* error);
 
 // Decrypt the given EncryptedConfiguration |onc| (see the ONC specification)
 // using |passphrase|. The resulting UnencryptedConfiguration is returned and
 // |error| is not modified. If an error occurs, returns NULL and if additionally
 // |error| is not NULL, |error| is set to a user readable error message.
 scoped_ptr<base::DictionaryValue> Decrypt(const std::string& passphrase,
                                           const base::DictionaryValue& onc,
                                           std::string* error);
 
 }  // chromeos
 }  // onc
 
 #endif  // CHROME_BROWSER_CHROMEOS_NETWORK_SETTINGS_ONC_UTILS_H_