Remove the drive status from the ash try.

ash/system/tray/system_tray_notifier.cc

 // 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.
 
 #include "ash/system/tray/system_tray_notifier.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/system/chromeos/network/network_state_notifier.h"
 #endif
 
@@ skipping 35 matching lines @@
 }
 
 void SystemTrayNotifier::AddClockObserver(ClockObserver* observer) {
   clock_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveClockObserver(ClockObserver* observer) {
   clock_observers_.RemoveObserver(observer);
 }
 
-void SystemTrayNotifier::AddDriveObserver(DriveObserver* observer) {
-  drive_observers_.AddObserver(observer);
-}
-
-void SystemTrayNotifier::RemoveDriveObserver(DriveObserver* observer) {
-  drive_observers_.RemoveObserver(observer);
-}
-
 void SystemTrayNotifier::AddIMEObserver(IMEObserver* observer) {
   ime_observers_.AddObserver(observer);
 }
 
 void SystemTrayNotifier::RemoveIMEObserver(IMEObserver* observer) {
   ime_observers_.RemoveObserver(observer);
 }
 
 void SystemTrayNotifier::AddLocaleObserver(LocaleObserver* observer) {
   locale_observers_.AddObserver(observer);
@@ skipping 195 matching lines @@
                     clock_observers_,
                     OnSystemClockTimeUpdated());
 }
 
 void SystemTrayNotifier::NotifySystemClockCanSetTimeChanged(bool can_set_time) {
   FOR_EACH_OBSERVER(ClockObserver,
                     clock_observers_,
                     OnSystemClockCanSetTimeChanged(can_set_time));
 }
 
-void SystemTrayNotifier::NotifyDriveJobUpdated(
-    const DriveOperationStatus& status) {
-  FOR_EACH_OBSERVER(DriveObserver,
-                    drive_observers_,
-                    OnDriveJobUpdated(status));
-}
-
 void SystemTrayNotifier::NotifyRefreshIME() {
   FOR_EACH_OBSERVER(IMEObserver,
                     ime_observers_,
                     OnIMERefresh());
 }
 
 void SystemTrayNotifier::NotifyLocaleChanged(
     LocaleObserver::Delegate* delegate,
     const std::string& cur_locale,
     const std::string& from_locale,
@@ skipping 99 matching lines @@
 
 void SystemTrayNotifier::NotifyLastWindowClosed() {
   FOR_EACH_OBSERVER(LastWindowClosedObserver,
                     last_window_closed_observers_,
                     OnLastWindowClosed());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash