Added Aura notification that relaunch and powerwash is required in case of downgrade.

chrome/browser/upgrade_detector.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/upgrade_detector.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 44 matching lines @@
   }
   NOTREACHED();
   return 0;
 }
 
 UpgradeDetector::UpgradeDetector()
     : upgrade_available_(UPGRADE_AVAILABLE_NONE),
       best_effort_experiment_updates_available_(false),
       critical_experiment_updates_available_(false),
       critical_update_acknowledged_(false),
+      is_factory_reset_required_(false),
       upgrade_notification_stage_(UPGRADE_ANNOYANCE_NONE),
       notify_upgrade_(false) {
 }
 
 UpgradeDetector::~UpgradeDetector() {
 }
 
 void UpgradeDetector::NotifyUpgradeRecommended() {
   notify_upgrade_ = true;
 
@@ skipping 52 matching lines @@
       break;
     case IDLE_STATE_ACTIVE:
     case IDLE_STATE_UNKNOWN:
       break;
     default:
       NOTREACHED();  // Need to add any new value above (either providing
                      // automatic restart or show notification to user).
       break;
   }
 }