Added login screen mode for adding users into session.

chrome/browser/chromeos/login/login_display_host_impl.h

 // Copyright (c) 2012 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_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_IMPL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 35 matching lines @@
     return default_host_;
   }
 
   // LoginDisplayHost implementation:
   virtual LoginDisplay* CreateLoginDisplay(
       LoginDisplay::Delegate* delegate) OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() const OVERRIDE;
   virtual WebUILoginView* GetWebUILoginView() const OVERRIDE;
   virtual views::Widget* GetWidget() const OVERRIDE;
   virtual void BeforeSessionStart() OVERRIDE;
-  virtual void OnSessionStart() OVERRIDE;
+  virtual void Finalize() OVERRIDE;
   virtual void OnCompleteLogin() OVERRIDE;
   virtual void OpenProxySettings() OVERRIDE;
   virtual void SetOobeProgressBarVisible(bool visible) OVERRIDE;
   virtual void SetShutdownButtonEnabled(bool enable) OVERRIDE;
   virtual void SetStatusAreaVisible(bool visible) OVERRIDE;
   virtual void CheckForAutoEnrollment() OVERRIDE;
   virtual void StartWizard(
       const std::string& first_screen_name,
       scoped_ptr<DictionaryValue> screen_parameters) OVERRIDE;
   virtual WizardController* GetWizardController() OVERRIDE;
+  virtual void StartUserAdding(
+      const base::Closure& completion_callback) OVERRIDE;
   virtual void StartSignInScreen() OVERRIDE;
   virtual void ResumeSignInScreen() OVERRIDE;
   virtual void OnPreferencesChanged() OVERRIDE;
 
   // Creates WizardController instance.
   WizardController* CreateWizardController();
 
   // Called when the first browser window is created, but before it's shown.
   void OnBrowserCreated();
 
@@ skipping 38 matching lines @@
   // Starts postponed WebUI (OOBE/sign in) if it was waiting for
   // wallpaper animation end.
   void StartPostponedWebUI();
 
   // Initializes |login_window_| and |login_view_| fields if needed.
   void InitLoginWindowAndView();
 
   // Closes |login_window_| and resets |login_window_| and |login_view_| fields.
   void ResetLoginWindowAndView();
 
+  // Returns true if hosr running UI for adding users into session.
+  bool IsRunningUserAdding();
+
   // Used to calculate position of the screens and background.
   gfx::Rect background_bounds_;
 
   content::NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<LoginDisplayHostImpl> pointer_factory_;
 
   // Default LoginDisplayHost.
   static LoginDisplayHost* default_host_;
 
@@ skipping 54 matching lines @@
   // pods to load.
   bool waiting_for_user_pods_;
 
   // How many times renderer has crashed.
   int crash_count_;
 
   // Way to restore if renderer have crashed.
   enum {
     RESTORE_UNKNOWN,
     RESTORE_WIZARD,
-    RESTORE_SIGN_IN
+    RESTORE_SIGN_IN,
+    RESTORE_USER_ADDING,

[Nikita (slow), 2013/05/28 11:34:22]

nit: Let's rename it to something more specific like
Add user to session

[dzhioev (left Google), 2013/05/29 13:05:04]

Done.

   } restore_path_;
 
   // Stored parameters for StartWizard, required to restore in case of crash.
   std::string wizard_first_screen_name_;
   scoped_ptr<DictionaryValue> wizard_screen_parameters_;
 
   // Old value of the ash::internal::kIgnoreSoloWindowFramePainterPolicy
   // property of the root window for |login_window_|.
   bool old_ignore_solo_window_frame_painter_policy_value_;
 
+  // Called before host deletion.
+  base::Closure completion_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(LoginDisplayHostImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_DISPLAY_HOST_IMPL_H_