Remove the drive status from the ash try.

ash/system/drive/tray_drive.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_DRIVE_TRAY_DRIVE_H_
-#define ASH_SYSTEM_DRIVE_TRAY_DRIVE_H_
-
-#include "ash/system/drive/drive_observer.h"
-#include "ash/system/tray/tray_image_item.h"
-#include "base/timer/timer.h"
-
-namespace views {
-class Label;
-}
-
-namespace ash {
-namespace tray {
-class DriveTrayView;
-class DriveDefaultView;
-class DriveDetailedView;
-}
-
-class TrayDrive : public TrayImageItem,
-                  public DriveObserver {
- public:
-  explicit TrayDrive(SystemTray* system_tray);
-  virtual ~TrayDrive();
-
- private:
-  // Overridden from TrayImageItem.
-  virtual bool GetInitialVisibility() OVERRIDE;
-
-  // Overridden from SystemTrayItem.
-  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
-  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
-  virtual void DestroyDefaultView() OVERRIDE;
-  virtual void DestroyDetailedView() OVERRIDE;
-  virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
-
-  // Overridden from DriveObserver.
-  virtual void OnDriveJobUpdated(const DriveOperationStatus& status) OVERRIDE;
-
-  // Delayed hiding of the tray item after encountering an empty operation list.
-  void HideIfNoOperations();
-
-  tray::DriveDefaultView* default_;
-  tray::DriveDetailedView* detailed_;
-  base::OneShotTimer<TrayDrive> hide_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayDrive);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_DRIVE_TRAY_DRIVE_H_