MD User Manager: Display error message when all profiles are locked.

chrome/browser/ui/webui/signin/user_manager_screen_handler.h

Index: chrome/browser/ui/webui/signin/user_manager_screen_handler.h
diff --git a/chrome/browser/ui/webui/signin/user_manager_screen_handler.h b/chrome/browser/ui/webui/signin/user_manager_screen_handler.h
index cb47ae95698c59ccf102f0648e8b97a0a29604c2..893698f41cf236da2590a2b3df6f99bf00491244 100644
--- a/chrome/browser/ui/webui/signin/user_manager_screen_handler.h
+++ b/chrome/browser/ui/webui/signin/user_manager_screen_handler.h
@@ -82,6 +82,7 @@ class UserManagerScreenHandler
   void HandleLaunchGuest(const base::ListValue* args);
   void HandleLaunchUser(const base::ListValue* args);
   void HandleRemoveUser(const base::ListValue* args);
+  void HandleIsAtLeastOneProfileUnlocked(const base::ListValue* args);
   void HandleAttemptUnlock(const base::ListValue* args);
   void HandleHardlockUserPod(const base::ListValue* args);
   void HandleRemoveUserWarningLoadStats(const base::ListValue* args);