Show progress bar as soon as update state changed to UPDATE_STATUS_UPDATE_AVAILABLE

chrome/browser/chromeos/login/update_view.h

Index: chrome/browser/chromeos/login/update_view.h
diff --git a/chrome/browser/chromeos/login/update_view.h b/chrome/browser/chromeos/login/update_view.h
index ed40c92e51d7b2b74a7e96eab43c49db88beab04..e6551e58c65e0192477b5b9361871c6312165a52 100644
--- a/chrome/browser/chromeos/login/update_view.h
+++ b/chrome/browser/chromeos/login/update_view.h
@@ -38,6 +38,9 @@ class UpdateView : public views::View {
   // 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);
@@ -57,6 +60,7 @@ class UpdateView : public views::View {
 
   // 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_;
@@ -72,6 +76,9 @@ class UpdateView : public views::View {
   // Show manual reboot label?
   bool show_manual_reboot_label_;
 
+  // Show preparing updates label?
+  bool show_preparing_updates_label_;
+
   // Notifications receiver.
   chromeos::ScreenObserver* observer_;