Added processing for a lost status to UpdateEngineClient.

chrome/browser/ui/webui/help/version_updater_chromeos.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 "chrome/browser/ui/webui/help/version_updater_chromeos.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 157 matching lines @@
   UpdateEngineClient::UpdateStatusOperation operation_to_show = status.status;
   if (status.status == UpdateEngineClient::UPDATE_STATUS_IDLE &&
       last_operation_ !=
       UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE) {
     operation_to_show = last_operation_;
   }
 
   switch (operation_to_show) {
     case UpdateEngineClient::UPDATE_STATUS_ERROR:
     case UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT:
+    case UpdateEngineClient::UPDATE_STATUS_ATTEMPTING_ROLLBACK:
       // This path previously used the FAILED status and IDS_UPGRADE_ERROR, but
       // the update engine reports errors for some conditions that shouldn't
       // actually be displayed as errors to users: http://crbug.com/146919.
       // Just use the UPDATED status instead.
       break;
     case UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE:
       my_status = CHECKING;
       break;
     case UpdateEngineClient::UPDATE_STATUS_DOWNLOADING:
       progress = static_cast<int>(round(status.download_progress * 100));
@@ skipping 19 matching lines @@
   last_operation_ = status.status;
 }
 
 void VersionUpdaterCros::OnUpdateCheck(
     UpdateEngineClient::UpdateCheckResult result) {
   // If version updating is not implemented, this binary is the most up-to-date
   // possible with respect to automatic updating.
   if (result == UpdateEngineClient::UPDATE_RESULT_NOTIMPLEMENTED)
     callback_.Run(UPDATED, 0, base::string16());
 }