Show progress bar as soon as update state changed to UPDATE_STATUS_UPDATE_AVAILABLE

chrome/browser/chromeos/login/update_view.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_CHROMEOS_LOGIN_UPDATE_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UPDATE_VIEW_H_
 #pragma once
 
 #include "views/view.h"
 
@@ skipping 20 matching lines @@
   // Advances view's progress bar. Maximum progress is 100.
   void AddProgress(int progress);
 
   // Sets the current value for the progress bar. Maximum progress is 100.
   void SetProgress(int progress);
 
   // Shows label with instructions for user to do a manual reboot.
   // Usually is not called since we rely on API that will reboot after update.
   void ShowManualRebootInfo();
 
+  // Shows label for "Preparing updates" state.
+  void ShowPreparingUpdatesInfo(bool visible);
+
   // Whether curtain window with throbber and label in the center should
   // be shown.
   void ShowCurtain(bool show_curtain);
 
   // views::View implementation:
   virtual void Layout();
 
  private:
   // Creates Label control and adds it as a child.
   void InitLabel(views::Label** label);
 
   // Updates visibility of the elements.
   void UpdateVisibility();
 
   // Keyboard accelerator to allow cancelling update by hitting escape.
   views::Accelerator escape_accelerator_;
 
   // Dialog controls.
   views::Label* installing_updates_label_;
+  views::Label* preparing_updates_label_;
   views::Label* reboot_label_;
   views::Label* manual_reboot_label_;
   views::Label* escape_to_skip_label_;
   views::ProgressBar* progress_bar_;
 
   // Curtain views.
   views::Label* checking_label_;
   views::Throbber* throbber_;
 
   // Show curtain view?
   bool show_curtain_;
 
   // Show manual reboot label?
   bool show_manual_reboot_label_;
 
+  // Show preparing updates label?
+  bool show_preparing_updates_label_;
+
   // Notifications receiver.
   chromeos::ScreenObserver* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UPDATE_VIEW_H_