Remove the drive status from the ash try.

ash/system/tray/default_system_tray_delegate.cc

 // 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.
 
 #include "ash/system/tray/default_system_tray_delegate.h"
 
 #include <string>
 
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
@@ skipping 106 matching lines @@
 void DefaultSystemTrayDelegate::ShowDisplaySettings() {
 }
 
 void DefaultSystemTrayDelegate::ShowChromeSlow() {
 }
 
 bool DefaultSystemTrayDelegate::ShouldShowDisplayNotification() {
   return false;
 }
 
-void DefaultSystemTrayDelegate::ShowDriveSettings() {
-}
-
 void DefaultSystemTrayDelegate::ShowIMESettings() {
 }
 
 void DefaultSystemTrayDelegate::ShowHelp() {
 }
 
 void DefaultSystemTrayDelegate::ShowAccessibilityHelp() {
 }
 
 void DefaultSystemTrayDelegate::ShowAccessibilitySettings() {
@@ skipping 58 matching lines @@
 void DefaultSystemTrayDelegate::GetCurrentIMEProperties(
     IMEPropertyInfoList* list) {
 }
 
 void DefaultSystemTrayDelegate::SwitchIME(const std::string& ime_id) {
 }
 
 void DefaultSystemTrayDelegate::ActivateIMEProperty(const std::string& key) {
 }
 
-void DefaultSystemTrayDelegate::CancelDriveOperation(int32 operation_id) {
-}
-
-void DefaultSystemTrayDelegate::GetDriveOperationStatusList(
-    ash::DriveOperationStatusList*) {
-}
-
 void DefaultSystemTrayDelegate::ShowNetworkConfigure(
     const std::string& network_id,
     gfx::NativeWindow parent_window) {
 }
 
 bool DefaultSystemTrayDelegate::EnrollNetwork(const std::string& network_id,
                                               gfx::NativeWindow parent_window) {
   return true;
 }
 
@@ skipping 65 matching lines @@
 bool DefaultSystemTrayDelegate::IsSearchKeyMappedToCapsLock() {
   return false;
 }
 
 tray::UserAccountsDelegate* DefaultSystemTrayDelegate::GetUserAccountsDelegate(
     const std::string& user_id) {
   return NULL;
 }
 
 }  // namespace ash