Allow recommended locales to be set for public sessions

chrome/browser/chromeos/login/screens/user_selection_screen.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 CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
 #include "chrome/browser/signin/screenlock_bridge.h"
 #include "components/user_manager/user.h"
 #include "ui/wm/core/user_activity_observer.h"
@@ skipping 41 matching lines @@
   // policy::DeviceLocalAccountPolicyService::Observer implementation:
   virtual void OnPolicyUpdated(const std::string& user_id) OVERRIDE;
   virtual void OnDeviceLocalAccountsChanged() OVERRIDE;
 
   // Fills |user_dict| with information about |user|.
   static void FillUserDictionary(
       user_manager::User* user,
       bool is_owner,
       bool is_signin_to_add,
       ScreenlockBridge::LockHandler::AuthType auth_type,
+      const std::vector<std::string>* public_session_recommended_locales,
       base::DictionaryValue* user_dict);
 
   // Determines if user auth status requires online sign in.
   static bool ShouldForceOnlineSignIn(const user_manager::User* user);
 
  private:
   // Check whether the display name set by policy for a public session has
   // changed and if so, notify the UI.
   void CheckForPublicSessionDisplayNameChange(
       policy::DeviceLocalAccountPolicyBroker* broker);
 
   // Notify the UI that the display name for a public session has changed,
   // taking the display name from the |User| owned by |UserManager|.
   void SetPublicSessionDisplayName(const std::string& user_id);
 
+  // Check whether the list of recommended locales set by policy for a public
+  // session has changed and if so, notify the UI.
+  void CheckForPublicSessionLocalePolicyChange(
+      policy::DeviceLocalAccountPolicyBroker* broker);
+
+  // Send an updated list of locales for a public session to the UI, consisting
+  // of the |recommended_locales| followed by all other available locales.
+  void SetPublicSessionLocales(
+      const std::string& user_id,
+      const std::vector<std::string>* recommended_locales);
+
   LoginDisplayWebUIHandler* handler_;
   bool handler_initialized_;
 
   policy::DeviceLocalAccountPolicyService* device_local_account_policy_service_;
 
   // Set of Users that are visible.
   user_manager::UserList users_;
 
   // Whether to show guest login.
   bool show_guest_;
 
   // Map from public session user IDs to their display names set by policy.
   typedef std::map<std::string, std::string> DisplayNamesMap;
   DisplayNamesMap public_session_display_names_;
 
+  // Map from public session user IDs to recommended locales set by policy.
+  typedef std::map<std::string, std::vector<std::string> >
+      PublicSessionRecommendedLocaleMap;
+  PublicSessionRecommendedLocaleMap public_session_recommended_locales_;
+
   // Map of usernames to their current authentication type. If a user is not
   // contained in the map, it is using the default authentication type.
   std::map<std::string, ScreenlockBridge::LockHandler::AuthType>
       user_auth_type_map_;
 
   // Timer for measuring idle state duration before password clear.
   base::OneShotTimer<UserSelectionScreen> password_clear_timer_;
 
   base::WeakPtrFactory<UserSelectionScreen> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserSelectionScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_