Allow recommended locales to be set for public sessions

chrome/browser/chromeos/login/screens/user_selection_screen.h

Index: chrome/browser/chromeos/login/screens/user_selection_screen.h
diff --git a/chrome/browser/chromeos/login/screens/user_selection_screen.h b/chrome/browser/chromeos/login/screens/user_selection_screen.h
index b7832f9dbcb2792eafb84c5b63ab9ee730c3eafc..d8cc1facc0ab25fb91e9a457282bfa61a63eb8ea 100644
--- a/chrome/browser/chromeos/login/screens/user_selection_screen.h
+++ b/chrome/browser/chromeos/login/screens/user_selection_screen.h
@@ -7,6 +7,7 @@
 
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ -68,6 +69,7 @@ class UserSelectionScreen
       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.
@@ -83,6 +85,17 @@ class UserSelectionScreen
   // 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_;
 
@@ -98,6 +111,11 @@ class UserSelectionScreen
   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>