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

chrome/browser/ui/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_FORCED_REAUTHENTICATION_DIALOG_H_
+#define CHROME_BROWSER_UI_FORCED_REAUTHENTICATION_DIALOG_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"

[sky, 2017/06/26 22:18:21]

This include isn't used.

+
+class Profile;
+class SigninManager;
+
+namespace base {
+class TimeDelta;
+}  // namespace base
+
+// The virtual class of ForcedReauthenticationDialog.
+class ForcedReauthenticationDialog {
+ public:
+  static std::unique_ptr<ForcedReauthenticationDialog> Create();
+
+  virtual ~ForcedReauthenticationDialog() = 0;

[sky, 2017/06/26 22:18:21]

Typically we inline these. That way you don't have to put the definition in each
platform.

+  // Show the ForcedReauthenticationDialog for |profile|. If there're no opened
+  // browser windows for |profile|, |signin_manager| will be called to signed
+  // out immediately. Otherwise, dialog will be closed with all browser windows
+  // are assoicated to |profile| after |countdown_duration| if there is no
+  // reauth.
+  virtual void ShowDialog(Profile* profile,
+                          SigninManager* signin_manager,
+                          base::TimeDelta countdown_duration) = 0;
+
+ protected:
+  ForcedReauthenticationDialog();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ForcedReauthenticationDialog);
+};
+
+#endif  // CHROME_BROWSER_UI_FORCED_REAUTHENTICATION_DIALOG_H_