Remove the drive status from the ash try.

ash/system/tray/system_tray_notifier.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_SYSTEM_TRAY_NOTIFIER_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_NOTIFIER_H_
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/system/audio/audio_observer.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
 #include "ash/system/chromeos/tray_tracing.h"
 #include "ash/system/date/clock_observer.h"
-#include "ash/system/drive/drive_observer.h"
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/locale/locale_observer.h"
 #include "ash/system/tray_accessibility.h"
 #include "ash/system/user/update_observer.h"
 #include "ash/system/user/user_observer.h"
 #include "base/observer_list.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/system/chromeos/enterprise/enterprise_domain_observer.h"
 #include "ash/system/chromeos/network/network_observer.h"
@@ skipping 23 matching lines @@
 
   void AddAudioObserver(AudioObserver* observer);
   void RemoveAudioObserver(AudioObserver* observer);
 
   void AddBluetoothObserver(BluetoothObserver* observer);
   void RemoveBluetoothObserver(BluetoothObserver* observer);
 
   void AddClockObserver(ClockObserver* observer);
   void RemoveClockObserver(ClockObserver* observer);
 
-  void AddDriveObserver(DriveObserver* observer);
-  void RemoveDriveObserver(DriveObserver* observer);
-
   void AddIMEObserver(IMEObserver* observer);
   void RemoveIMEObserver(IMEObserver* observer);
 
   void AddLocaleObserver(LocaleObserver* observer);
   void RemoveLocaleObserver(LocaleObserver* observer);
 
   void AddTracingObserver(TracingObserver* observer);
   void RemoveTracingObserver(TracingObserver* observer);
 
   void AddUpdateObserver(UpdateObserver* observer);
@@ skipping 40 matching lines @@
   void NotifyAudioNodesChanged();
   void NotifyAudioActiveOutputNodeChanged();
   void NotifyAudioActiveInputNodeChanged();
   void NotifyTracingModeChanged(bool value);
   void NotifyRefreshBluetooth();
   void NotifyBluetoothDiscoveringChanged();
   void NotifyRefreshClock();
   void NotifyDateFormatChanged();
   void NotifySystemClockTimeUpdated();
   void NotifySystemClockCanSetTimeChanged(bool can_set_time);
-  void NotifyDriveJobUpdated(const DriveOperationStatus& status);
   void NotifyRefreshIME();
   void NotifyLocaleChanged(LocaleObserver::Delegate* delegate,
                            const std::string& cur_locale,
                            const std::string& from_locale,
                            const std::string& to_locale);
   void NotifyUpdateRecommended(UpdateObserver::UpdateSeverity severity);
   void NotifyUserUpdate();
   void NotifyUserAddedToSession();
 #if defined(OS_CHROMEOS)
   void NotifyShowLoginButtonChanged(bool show_login_button);
@@ skipping 15 matching lines @@
   NetworkStateNotifier* network_state_notifier() {
     return network_state_notifier_.get();
   }
 #endif
 
  private:
   ObserverList<AccessibilityObserver> accessibility_observers_;
   ObserverList<AudioObserver> audio_observers_;
   ObserverList<BluetoothObserver> bluetooth_observers_;
   ObserverList<ClockObserver> clock_observers_;
-  ObserverList<DriveObserver> drive_observers_;
   ObserverList<IMEObserver> ime_observers_;
   ObserverList<LocaleObserver> locale_observers_;
   ObserverList<TracingObserver> tracing_observers_;
   ObserverList<UpdateObserver> update_observers_;
   ObserverList<UserObserver> user_observers_;
 #if defined(OS_CHROMEOS)
   ObserverList<LogoutButtonObserver> logout_button_observers_;
   ObserverList<SessionLengthLimitObserver> session_length_limit_observers_;
   ObserverList<NetworkObserver> network_observers_;
   ObserverList<NetworkPortalDetectorObserver>
       network_portal_detector_observers_;
   ObserverList<EnterpriseDomainObserver> enterprise_domain_observers_;
   ObserverList<MediaCaptureObserver> media_capture_observers_;
   ObserverList<ScreenCaptureObserver> screen_capture_observers_;
   ObserverList<ScreenShareObserver> screen_share_observers_;
   ObserverList<LastWindowClosedObserver> last_window_closed_observers_;
   scoped_ptr<NetworkStateNotifier> network_state_notifier_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayNotifier);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_NOTIFIER_H_