After signin token check failed, show force reauth dialog and start window closing countdown.

chrome/browser/ui/views/profiles/forced_reauthentication_dialog.h

 // Copyright 2017 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_VIEWS_PROFILES_FORCED_REAUTHENTICATION_DIALOG_H_
 #define CHROME_BROWSER_UI_VIEWS_PROFILES_FORCED_REAUTHENTICATION_DIALOG_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 14 matching lines @@
   ~ForcedReauthenticationDialog() override;
 
   // Shows a warning dialog for |profile|. If there are no Browser windows
   // associated with |profile|, signs out the profile immediately, otherwise the
   // user can clicks accept to sign in again. Dialog will be closed after
   // |countdown_duration| seconds.
   // Dialog will delete itself after closing.
   static ForcedReauthenticationDialog* ShowDialog(
       Profile* profile,
       SigninManager* signin_manager,
-      const base::TimeDelta& countdown_duration);
+      base::TimeDelta countdown_duration);
 
   // override views::DialogDelegateView
   bool Accept() override;
   bool Cancel() override;
   void WindowClosing() override;
   base::string16 GetWindowTitle() const override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
   ui::ModalType GetModalType() const override;
 
   // override views::View
   void AddedToWidget() override;
 
  private:
   // Show the dialog for |browser|. The dialog will delete itself after closing.
   ForcedReauthenticationDialog(Browser* browser,
                                SigninManager* signin_manager,
-                               const base::TimeDelta& countdown_duration);
+                               base::TimeDelta countdown_duration);
 
   void OnCountDown();
   base::TimeDelta GetTimeRemaining() const;
 
   Browser* browser_;
   SigninManager* signin_manager_;
 
   const base::TimeTicks desired_close_time_;
 
   // The timer which is used to refresh the dialog title to display the
   // remaining time.
   base::RepeatingTimer refresh_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ForcedReauthenticationDialog);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PROFILES_FORCED_REAUTHENTICATION_DIALOG_H_