Add LogoutConfirmationController to show LogoutConfirmationDialogs

ash/system/logout_button/logout_button_tray.h

 // Copyright 2013 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_BUTTON_TRAY_H_
 #define ASH_SYSTEM_LOGOUT_BUTTON_LOGOUT_BUTTON_TRAY_H_
 
 #include "ash/ash_export.h"
 #include "ash/system/logout_button/logout_button_observer.h"
-#include "ash/system/logout_button/logout_confirmation_dialog_view.h"
 #include "ash/system/tray/tray_background_view.h"
 #include "ash/system/user/login_status.h"
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "ui/views/controls/button/button.h"
 
 namespace views {
 class LabelButton;
 }
 
 namespace ash {
 namespace internal {
 
@@ skipping 18 matching lines @@
   // LogoutButtonObserver:
   virtual void OnShowLogoutButtonInTrayChanged(bool show) OVERRIDE;
   virtual void OnLogoutDialogDurationChanged(base::TimeDelta duration) OVERRIDE;
 
   // views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   void UpdateAfterLoginStatusChange(user::LoginStatus login_status);
 
-  // Nullify the pointer to confirmation dialog, this is expected to be called
-  // when the confirmation dialog is going to be destroyed.
-  // Note: the confirmation dialog is not owned by LogoutButtonTray.
-  void ReleaseConfirmationDialog();
-
-  void SetDelegateForTest(
-      scoped_ptr<LogoutConfirmationDialogView::Delegate> delegate);
-
  private:
-  friend class LogoutConfirmationDialogTest;
-
-  bool IsConfirmationDialogShowing() const;
-  void EnsureConfirmationDialogIsShowing();
-  void EnsureConfirmationDialogIsClosed();
-
   void UpdateVisibility();
 
-  views::LabelButton* button_;  // Not owned.
+  views::LabelButton* button_;
   user::LoginStatus login_status_;
   bool show_logout_button_in_tray_;
   base::TimeDelta dialog_duration_;
 
-  LogoutConfirmationDialogView* confirmation_dialog_;  // Not owned.
-  scoped_ptr<LogoutConfirmationDialogView::Delegate> confirmation_delegate_;
-
   DISALLOW_COPY_AND_ASSIGN(LogoutButtonTray);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_LOGOUT_BUTTON_LOGOUT_BUTTON_TRAY_H_