Fixed suggesting adding more users into multi-profile session when we don't have more

chrome/browser/ui/ash/session_state_delegate_chromeos.cc

Index: chrome/browser/ui/ash/session_state_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
index bcf70f4fe6d38cc90649745ae0626654b408e45c..8a854500db5f11c5a29f1c07456edd25a9fb6908 100644
--- a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
@@ -83,6 +83,18 @@ int SessionStateDelegateChromeos::NumberOfLoggedInUsers() const {
   return user_manager::UserManager::Get()->GetLoggedInUsers().size();
 }
 
+bool SessionStateDelegateChromeos::CanAddUserToMultiProfile(
+    AddUserError* error) const {
+  if (user_manager::UserManager::Get()
+          ->GetUsersAdmittedForMultiProfile()
+          .size() == 0) {
+    if (error)
+      *error = ADD_USER_ERROR_OUT_OF_USERS;
+    return false;
+  }
+  return SessionStateDelegate::CanAddUserToMultiProfile(error);
+}
+
 bool SessionStateDelegateChromeos::IsActiveUserSessionStarted() const {
   return user_manager::UserManager::Get()->IsSessionStarted();
 }