Handle case in LMU creation when there are no managers available

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h

 // Copyright (c) 2013 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_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 253 matching lines @@
   // for cases when extension should be loaded in the background and it
   // shouldn't grab the focus. |offline| is true when offline version of the
   // extension should be used.
   void LoadAuthExtension(bool force, bool silent_load, bool offline);
 
   // Updates authentication extension. Called when device settings that affect
   // sign-in (allow BWSI and allow whitelist) are changed.
   void UpdateAuthExtension();
   void UpdateAddButtonStatus();
 
+  // Fill |params| that are passed to JS..
+  void UpdateAuthParams(DictionaryValue* params);
+
   // Restore input focus to current user pod.
   void RefocusCurrentPod();
 
   // WebUI message handlers.
   void HandleCompleteAuthentication(const std::string& email,
                                     const std::string& password,
                                     const std::string& auth_code);
   void HandleCompleteLogin(const std::string& typed_email,
                            const std::string& password);
   void HandleGetUsers();
@@ skipping 162 matching lines @@
 
   // Testing helper, specifies new value for gaia url.
   GURL gaia_url_for_test_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_