ash: Refresh the tray items, instead of recreating them, when login status changes.

ash/system/ime/tray_ime.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/ime/tray_ime.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
@@ skipping 211 matching lines @@
 }
 
 void TrayIME::DestroyDefaultView() {
   default_.reset();
 }
 
 void TrayIME::DestroyDetailedView() {
   detailed_.reset();
 }
 
+void TrayIME::UpdateAfterLoginStatusChange(user::LoginStatus status) {
+}
+
 void TrayIME::OnIMERefresh() {
   SystemTrayDelegate* delegate = Shell::GetInstance()->tray_delegate();
   IMEInfoList list;
   IMEInfo current;
   IMEPropertyInfoList property_list;
   delegate->GetCurrentIME(&current);
   delegate->GetAvailableIMEList(&list);
   delegate->GetCurrentIMEProperties(&property_list);
 
   UpdateTrayLabel(current, list.size());
 
   if (default_.get())
     default_->UpdateLabel(current);
   if (detailed_.get())
     detailed_->Update(list, property_list);
 }
 
 }  // namespace internal
 }  // namespace ash