If user profile doesn't contain language setting, default to his Google account settings.

chrome/browser/chromeos/login/user_manager_impl.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_LOGIN_USER_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 61 matching lines @@
   virtual const User* GetLoggedInUser() const OVERRIDE;
   virtual User* GetLoggedInUser() OVERRIDE;
   virtual const User* GetActiveUser() const OVERRIDE;
   virtual User* GetActiveUser() OVERRIDE;
   virtual const User* GetPrimaryUser() const OVERRIDE;
   virtual void SaveUserOAuthStatus(
       const std::string& username,
       User::OAuthTokenStatus oauth_token_status) OVERRIDE;
   virtual void SaveUserDisplayName(const std::string& username,
                                    const string16& display_name) OVERRIDE;
+  virtual void UpdateUserAccountData(const std::string& username,
+                                     const string16& display_name,
+                                     const std::string& locale) OVERRIDE;
   virtual string16 GetUserDisplayName(
       const std::string& username) const OVERRIDE;
   virtual void SaveUserDisplayEmail(const std::string& username,
                                     const std::string& display_email) OVERRIDE;
   virtual std::string GetUserDisplayEmail(
       const std::string& username) const OVERRIDE;
   virtual std::string GetManagedUserSyncId(
       const std::string& managed_user_id) const OVERRIDE;
   virtual string16 GetManagerDisplayNameForManagedUser(
       const std::string& managed_user_id) const OVERRIDE;
@@ skipping 53 matching lines @@
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // policy::DeviceLocalAccountPolicyService::Observer implementation.
   virtual void OnPolicyUpdated(const std::string& user_id) OVERRIDE;
   virtual void OnDeviceLocalAccountsChanged() OVERRIDE;
 
+  // Wait untill we have sufficient information on user locale and apply it.
+  void RespectLocalePreference(Profile* profile, const User* user) const;
+
  private:
   friend class UserManager;
   friend class WallpaperManager;
   friend class UserManagerTest;
   friend class WallpaperManagerTest;
 
   UserManagerImpl();
 
   // LoginUtils::Delegate implementation:
   // Used when restoring user sessions after crash.
@@ skipping 130 matching lines @@
 
   // Called by OnRestoreActiveSessions() when there're user sessions in
   // |pending_user_sessions_| that has to be restored one by one.
   // Also called after first user session from that list is restored and so on.
   // Process continues till |pending_user_sessions_| map is not empty.
   void RestorePendingUserSessions();
 
   // Sends metrics in response to a regular user logging in.
   void SendRegularUserLoginMetrics(const std::string& email);
 
+  // UpdateUserAccountData() + SaveUserDisplayName() .
+  void UpdateUserAccountDataImpl(const std::string& username,
+                                 const string16& display_name,
+                                 const std::string* locale);
+
+  // Returns NULL if User is not created.
+  User* GetUserByProfile(Profile* profile) const;
+
+  Profile* GetProfileByUser(const User* user) const;
+
   // Interface to the signed settings store.
   CrosSettings* cros_settings_;
 
   // Interface to device-local account definitions and associated policy.
   policy::DeviceLocalAccountPolicyService* device_local_account_policy_service_;
 
   // True if users have been loaded from prefs already.
   bool users_loaded_;
 
   // List of all known users. User instances are owned by |this|. Regular users
@@ skipping 93 matching lines @@
       local_accounts_subscription_;
   scoped_ptr<CrosSettings::ObserverSubscription>
       supervised_users_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(UserManagerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_MANAGER_IMPL_H_