chromeos: Remove UpdateObserver, which has been unused for long.

chrome/browser/chromeos/update_observer.cc

-// Copyright (c) 2010 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 "chrome/browser/chromeos/update_observer.h"
-
-#include "base/string_number_conversions.h"
-#include "base/utf_string_conversions.h"
-#include "chrome/common/time_format.h"
-#include "grit/generated_resources.h"
-#include "grit/theme_resources.h"
-#include "ui/base/l10n/l10n_util.h"
-
-namespace chromeos {
-
-UpdateObserver::UpdateObserver(Profile* profile)
-    : notification_(profile, "update.chromeos", IDR_NOTIFICATION_UPDATE,
-                    l10n_util::GetStringUTF16(IDS_UPDATE_TITLE)) {}
-
-UpdateObserver::~UpdateObserver() {
-  notification_.Hide();
-}
-
-void UpdateObserver::UpdateStatusChanged(UpdateLibrary* library) {
-#if 0
-  // TODO seanparent@chromium.org : This update should only be shown when an
-  // update is critical and should include a restart button using the
-  // update_engine restart API. Currently removed entirely per Kan's request.
-
-  if (library->status().status == UPDATE_STATUS_UPDATED_NEED_REBOOT) {
-    notification_.Show(l10n_util::GetStringUTF16(IDS_UPDATE_COMPLETED), true);
-  }
-#endif
-}
-
-}  // namespace chromeos