Add flag to track migration from email to gaia id.

components/signin/core/browser/account_tracker_service.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_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 30 matching lines @@
 
   // Clients of AccountTrackerService can implement this interface and register
   // with AddObserver() to learn about account information changes.
   class Observer {
    public:
     virtual ~Observer() {}
     virtual void OnAccountUpdated(const AccountInfo& info) = 0;
     virtual void OnAccountRemoved(const AccountInfo& info) = 0;
   };
 
+  // Possible values for the kAccountIdMigrationState preference.
+  enum AccountIdMigrationState {
+    MIGRATION_NOT_STARTED,
+    MIGRATION_IN_PROGRESS,
+    MIGRATION_DONE
+  };
+
   AccountTrackerService();
   virtual ~AccountTrackerService();
 
   // KeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   void Initialize(OAuth2TokenService* token_service,
                   PrefService* pref_service,
                   net::URLRequestContextGetter* request_context_getter);
 
   // Returns the list of known accounts and for which gaia IDs
   // have been fetched.
   std::vector<AccountInfo> GetAccounts() const;
   AccountInfo GetAccountInfo(const std::string& account_id);
   AccountInfo FindAccountInfoByGaiaId(const std::string& gaia_id);
   AccountInfo FindAccountInfoByEmail(const std::string& email);
 
   // Indicates if all user information has been fetched. If the result is false,
   // there are still unfininshed fetchers.
   virtual bool IsAllUserInfoFetched() const;
 
+  AccountIdMigrationState GetMigrationState();
+  static AccountIdMigrationState GetMigrationState(PrefService* pref_service);
+
  private:
   friend class AccountInfoFetcher;
 
   // These methods are called by fetchers.
   void OnUserInfoFetchSuccess(AccountInfoFetcher* fetcher,
                               const base::DictionaryValue* user_info);
   void OnUserInfoFetchFailure(AccountInfoFetcher* fetcher);
 
   // OAuth2TokenService::Observer implementation.
   virtual void OnRefreshTokenAvailable(const std::string& account_id) OVERRIDE;
@@ skipping 23 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   std::map<std::string, AccountInfoFetcher*> user_info_requests_;
   std::map<std::string, AccountState> accounts_;
   ObserverList<Observer> observer_list_;
   bool shutdown_called_;
 
   DISALLOW_COPY_AND_ASSIGN(AccountTrackerService);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_ACCOUNT_TRACKER_SERVICE_H_