Add LogoutConfirmationController to show LogoutConfirmationDialogs

ash/system/logout_button/logout_confirmation_dialog_view.h

-// Copyright 2014 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 ASH_SYSTEM_LOGOUT_BUTTON_LOGOUT_CONFIRMATION_DIALOG_VIEW_H_
-#define ASH_SYSTEM_LOGOUT_BUTTON_LOGOUT_CONFIRMATION_DIALOG_VIEW_H_
-
-#include "ash/ash_export.h"
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "ui/views/window/dialog_delegate.h"
-
-namespace views {
-class Label;
-}
-
-namespace ash {
-namespace internal {
-
-class LogoutButtonTray;
-
-// This class implements dialog view for logout confirmation.
-class ASH_EXPORT LogoutConfirmationDialogView
-    : public views::DialogDelegateView {
- public:
-  class ASH_EXPORT Delegate {
-   public:
-    virtual ~Delegate() {}
-
-    virtual void LogoutCurrentUser() = 0;
-    virtual base::TimeTicks GetCurrentTime() const = 0;
-    virtual void ShowDialog(views::DialogDelegate* dialog) = 0;
-  };
-
-  LogoutConfirmationDialogView(LogoutButtonTray* owner, Delegate* delegate);
-  virtual ~LogoutConfirmationDialogView();
-
-  // views::DialogDelegateView:
-  virtual bool Accept() OVERRIDE;
-  virtual ui::ModalType GetModalType() const OVERRIDE;
-  virtual base::string16 GetWindowTitle() const OVERRIDE;
-  virtual base::string16
-      GetDialogButtonLabel(ui::DialogButton button) const OVERRIDE;
-  virtual void OnClosed() OVERRIDE;
-  virtual void DeleteDelegate() OVERRIDE;
-
-  void Show(base::TimeDelta duration);
-
-  // The duration of the confirmation dialog can be changed while the dialog
-  // is still showing. This method is only expected to be called when the
-  // preference for confirmation dialog duration has changed.
-  void UpdateDialogDuration(base::TimeDelta duration);
-
- private:
-  void LogoutCurrentUser();
-  void UpdateCountdown();
-
-  views::Label* text_label_;
-
-  base::TimeTicks countdown_start_time_;
-  base::TimeDelta duration_;
-
-  base::RepeatingTimer<LogoutConfirmationDialogView> timer_;
-
-  LogoutButtonTray* owner_;
-
-  Delegate* delegate_;
-
-  DISALLOW_COPY_AND_ASSIGN(LogoutConfirmationDialogView);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_LOGOUT_BUTTON_LOGOUT_CONFIRMATION_DIALOG_VIEW_H_