ash uber tray: Allow customizing each item depending on whether the user is logged in or not.

ash/system/tray_user.h

-// Copyright (c) 2012 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_TRAY_USER_H_
-#define ASH_SYSTEM_TRAY_USER_H_
-#pragma once
-
-#include "ash/system/tray/system_tray_item.h"
-
-namespace ash {
-namespace internal {
-
-class TrayUser : public SystemTrayItem {
- public:
-  TrayUser();
-  virtual ~TrayUser();
-
- private:
-  // Overridden from SystemTrayItem
-  virtual views::View* CreateTrayView() OVERRIDE;
-  virtual views::View* CreateDefaultView() OVERRIDE;
-  virtual views::View* CreateDetailedView() OVERRIDE;
-  virtual void DestroyTrayView() OVERRIDE;
-  virtual void DestroyDefaultView() OVERRIDE;
-  virtual void DestroyDetailedView() OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayUser);
-};
-
-}  // namespace internal
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_TRAY_USER_H_