If force-sign-in policy is enabled, popup warning dialog before window closing if auth token becom…

chrome/browser/ui/views/profiles/force_signout_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_FORCE_SIGNOUT_DIALOG_H_
+#define CHROME_BROWSER_UI_VIEWS_PROFILES_FORCE_SIGNOUT_DIALOG_H_
+
+#include <memory>
+#include <string>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chrome/browser/ui/browser_list_observer.h"
+#include "chrome/browser/ui/views/browser_modal_dialog.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/window/dialog_delegate.h"
+
+class Browser;
+class Profile;
+class SigninManager;
+
+// A modal dialog that displays a warning message of the auth failure
+// before signing the user out and closing browser windows.
+class ForceSignoutDialog : public BrowserModalDialog,
+                           public chrome::BrowserListObserver,
+                           public views::DialogDelegateView {
+ public:
+  // Callback when user confirm/cancel the dialog. True if the dialog is
+  // confirmed.
+  using SignoutCallback = base::Callback<void(bool)>;

[sky, 2017/05/18 16:50:51]

Use OnceCallback.

+
+  // Show the dialog for |browser|, call signout_callback after the dialog is
+  // confirmed or canceled by user.
+  ForceSignoutDialog(Browser* browser,
+                     SigninManager* signin_manager,
+                     const SignoutCallback& signout_callback,
+                     bool delay_allowed);

[sky, 2017/05/18 16:50:51]

I was confused by the name delay_allowed. How about can_postpone, or
can_delay_signout?

+  ~ForceSignoutDialog() override;
+
+  // Shows a warning dialog for |profile|. If there are no Browser windows
+  // associated with |profile| this signs out the profile immediately, otherwise
+  // the user clicks accept or cancel on the dialog. Sign out the profile if
+  // user confirmed the window or sign out the profile with a delay if
+  // |delay_allow| is true. Call |signout_callback| with false if user cancel
+  // the dialog, otherwise call it with true.
+  static ForceSignoutDialog* ShowDialog(Profile* profile,
+                                        SigninManager* signin_manager,
+                                        const SignoutCallback& signout_callback,
+                                        bool delay_allowed);
+
+  // override BrowserModalDialog
+  void ActivateModalDialog(Browser* browser) override;
+  bool IsShowing() override;
+
+  // override chrome::BrowserListObserver
+  void OnBrowserRemoved(Browser* browser) override;
+
+  // override views::DialogDelegateView
+  bool Accept() override;
+  bool Cancel() override;
+  base::string16 GetWindowTitle() const override;
+  base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
+  int GetDialogButtons() const override;
+  ui::ModalType GetModalType() const override;
+
+  // override views::View
+  void AddedToWidget() override;
+
+ private:
+  Browser* browser_;
+  SigninManager* signin_manager_;
+  const SignoutCallback signout_callback_;
+  bool delay_allowed_;
+
+  DISALLOW_COPY_AND_ASSIGN(ForceSignoutDialog);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_PROFILES_FORCE_SIGNOUT_DIALOG_H_