[cros,login] Pre-load login extension in the background.

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 121 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);
+
   // 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 15 matching lines @@
 
   // Handles Enterprise Enrollment screen toggling.
   void HandleToggleEnrollmentScreen(const base::ListValue* args);
 
   // Handles 'launchHelpApp' request.
   void HandleLaunchHelpApp(const base::ListValue* args);
 
   // Handle 'createAccount' request.
   void HandleCreateAccount(const base::ListValue* args);
 
+  // Handle 'accountPickerReady' request.
+  void HandleAccountPickerReady(const base::ListValue* args);
+
   // Handle 'loginWebuiReady' request.
   void HandleLoginWebuiReady(const base::ListValue* args);
 
   // Handle 'loginRequestNetworkState' request.
   void HandleLoginRequestNetworkState(const base::ListValue* args);
 
   // Handle 'loginAddNetworkStateObserver' request.
   void HandleLoginAddNetworkStateObserver(const base::ListValue* args);
 
   // Handle 'loginRemoveNetworkStateObserver' request.
@@ skipping 11 matching lines @@
 
   // A delegate that glues this handler with backend LoginDisplay.
   SigninScreenHandlerDelegate* delegate_;
 
   // Whether screen should be shown right after initialization.
   bool show_on_init_;
 
   // Keeps whether screen should be shown for OOBE.
   bool oobe_ui_;
 
+  // Whether webui has been loaded for the first time.
+  bool is_first_webui_ready_;
+
+  // Whether it is the first attempt to load the gaia extension.
+  bool is_first_attempt_;
+
   // True if dns cache cleanup is done.
   bool dns_cleared_;
 
   // True if DNS cache task is already running.
   bool dns_clear_task_running_;
 
   // True if cookie jar cleanup is done.
   bool cookies_cleared_;
 
-  // True if new user sign in flow is driven by the extension.
-  bool extension_driven_;
-
   // Help application used for help dialogs.
   scoped_refptr<HelpAppLauncher> help_app_;
 
   // Network state informer used to keep offline message screen up.
   scoped_ptr<NetworkStateInformer> network_state_informer_;
 
   // Email to pre-populate with.
   std::string email_;
 
   // Test credentials.
   std::string test_user_;
   std::string test_pass_;
 
   BrowsingDataRemover* cookie_remover_;
 
   base::WeakPtrFactory<SigninScreenHandler> weak_factory_;
 
   // 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_