[cros,login] Restore the focus after hidden auth extension has grabbed it.

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

 // Copyright (c) 2011 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_
 #pragma once
 
 #include <string>
 
@@ skipping 125 matching lines @@
   // BrowsingDataRemover::Observer overrides.
   virtual void OnBrowsingDataRemoverDone() OVERRIDE;
 
   // SystemKeyEventListener::CapsLockObserver overrides.
   virtual void OnCapsLockChange(bool enabled) OVERRIDE;
 
   // Shows signin screen after dns cache and cookie cleanup operations finish.
   void ShowSigninScreenIfReady();
 
   // Tells webui to load authentication extension. |force| is used to force the
-  // extension reloading, if it has already been loaded.
-  void LoadAuthExtension(bool force);
+  // extension reloading, if it has already been loaded. |silent_load| is true
+  // for cases when extension should be loaded in the background and it
+  // shouldn't grab the focus.
+  void LoadAuthExtension(bool force, bool silent_load);
 
   // Handles confirmation message of user authentication that was performed by
   // the authentication extension.
   void HandleCompleteLogin(const base::ListValue* args);
 
   // Handles get existing user list request when populating account picker.
   void HandleGetUsers(const base::ListValue* args);
 
   // Handles authentication request when signing in an existing user.
   void HandleAuthenticateUser(const base::ListValue* args);
@@ skipping 94 matching lines @@
 
   // CapsLock state change notifier instance;
   SystemKeyEventListener* key_event_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(SigninScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_SIGNIN_SCREEN_HANDLER_H_