Start the migration of passwords from the Keychain.

components/password_manager/core/common/password_manager_pref_names.h

 // Copyright 2014 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 COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_PASSWORD_MANAGER_PREF_NAMES_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_PASSWORD_MANAGER_PREF_NAMES_H_
 
 #include "base/basictypes.h"
 
 namespace password_manager {
+
+#if defined(OS_MACOSX)
+// Status of password migration from the Keychain.
+enum class MigrationStatus {
+  // Migration wasn't tried yet.
+  NOT_STARTED = 0,
+
+  // Migration finished successfully.
+  MIGRATED,
+
+  // Migration failed once. It should be tried again.
+  FAILED_ONCE,
+
+  // Migration failed twice. It should not be tried again.
+  FAILED_TWICE,
+
+  NUM_MIGRATION_STATUS,
+};
+#endif
+
 namespace prefs {
 
 // Alphabetical list of preference names specific to the PasswordManager
 // component.
 
 // The value of this parameter is boolean that indicates whether
 // "Allow to collect URL?" bubble was shown or not.
 extern const char kAllowToCollectURLBubbleWasShown[];
 
 // The value of this parameter is used to calculate the start day of the
 // period, in which the "Allow to collect URL?" bubble can be shown.
 extern const char kAllowToCollectURLBubbleActivePeriodStartFactor[];
 
 #if !defined(OS_MACOSX) && !defined(OS_CHROMEOS) && defined(OS_POSIX)
 // The local profile id for this profile.
 extern const char kLocalProfileId[];
 #endif
 
 #if defined(OS_WIN)
 // Whether the password was blank, only valid if OS password was last changed
 // on or before the value contained in kOsPasswordLastChanged.
 extern const char kOsPasswordBlank[];
 
 // The number of seconds since epoch that the OS password was last changed.
 extern const char kOsPasswordLastChanged[];
 #endif
 
+#if defined(OS_MACOSX)
+// The current status of migrating the passwords from the Keychain to the
+// database. Stores the value from MigrationStatus.

[vabr (Chromium), 2015/07/06 09:50:19]

nit: the value -> a value
(The type does not hold a concrete value, as a variable would, so there is no
already defined "the value" to speak about.)

[vasilii, 2015/07/06 13:57:58]

Done.

+extern const char kKeychainMigrationStatus[];
+#endif
+
 // Boolean controlling whether the password manager allows to retrieve passwords
 // in clear text.
 extern const char kPasswordManagerAllowShowPasswords[];
 
 // Boolean controlling whether the password manager allows automatic signing in
 // through Credential Manager API.
 extern const char kPasswordManagerAutoSignin[];
 
 // Boolean that is true if password saving is on (will record new
 // passwords and fill in known passwords). When it is false, it doesn't
 // ask if you want to save passwords but will continue to fill passwords.
 // Constant name and its value differ because of historical reasons as it
 // was not deemed important enough to add migration code just for name
 // change.
 // See http://crbug.com/392387
 extern const char kPasswordManagerSavingEnabled[];
 
 // A list of numbers. Each number corresponds to one of the domains monitored
 // for save-password-prompt breakages. That number is a random index into
 // the array of groups containing the monitored domain. That group should be
 // used for reporting that domain.
 extern const char kPasswordManagerGroupsForDomains[];
 
 }  // namespace prefs
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_PASSWORD_MANAGER_PREF_NAMES_H_