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

chrome/browser/upgrade_detector.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UPGRADE_DETECTOR_H_
 #define CHROME_BROWSER_UPGRADE_DETECTOR_H_
 
 #include "base/timer/timer.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/idle.h"
@@ skipping 48 matching lines @@
   // so we don't need to complain about it for now.
   void acknowledge_critical_update() {
     critical_update_acknowledged_ = true;
   }
 
   // Whether the user has acknowledged the critical update.
   bool critical_update_acknowledged() const {
     return critical_update_acknowledged_;
   }
 
+  bool is_factory_reset_required() const { return is_factory_reset_required_; }
+
   // Retrieves the right icon ID based on the degree of severity (see
   // UpgradeNotificationAnnoyanceLevel, each level has an an accompanying icon
   // to go with it) to display within the wrench menu.
   int GetIconResourceID();
 
   UpgradeNotificationAnnoyanceLevel upgrade_notification_stage() const {
     return upgrade_notification_stage_;
   }
 
  protected:
@@ skipping 39 matching lines @@
   }
 
   void set_critical_update_acknowledged(bool acknowledged) {
     critical_update_acknowledged_ = acknowledged;
   }
 
   void set_upgrade_notification_stage(UpgradeNotificationAnnoyanceLevel stage) {
     upgrade_notification_stage_ = stage;
   }
 
+  void set_is_factory_reset_required(bool is_factory_reset_required) {
+    is_factory_reset_required_ = is_factory_reset_required;
+  }
+
  private:
   // Initiates an Idle check. See IdleCallback below.
   void CheckIdle();
 
   // The callback for the IdleCheck. Tells us whether Chrome has received any
   // input events since the specified time.
   void IdleCallback(IdleState state);
 
   // Triggers a global notification of the specified |type|.
   void TriggerNotification(chrome::NotificationType type);
 
   // Whether any software updates are available (experiment updates are tracked
   // separately via additional member variables below).
   UpgradeAvailable upgrade_available_;
 
   // Whether "best effort" experiment updates are available.
   bool best_effort_experiment_updates_available_;
 
   // Whether "critical" experiment updates are available.
   bool critical_experiment_updates_available_;
 
   // Whether the user has acknowledged the critical update.
   bool critical_update_acknowledged_;
 
+  // Whether a factory reset is needed to complete an update.
+  bool is_factory_reset_required_;
+
   // A timer to check to see if we've been idle for long enough to show the
   // critical warning. Should only be set if |upgrade_available_| is
   // UPGRADE_AVAILABLE_CRITICAL.
   base::RepeatingTimer<UpgradeDetector> idle_check_timer_;
 
   // The stage at which the annoyance level for upgrade notifications is at.
   UpgradeNotificationAnnoyanceLevel upgrade_notification_stage_;
 
   // Whether we have waited long enough after detecting an upgrade (to see
   // is we should start nagging about upgrading).
   bool notify_upgrade_;
 
   DISALLOW_COPY_AND_ASSIGN(UpgradeDetector);
 };
 
 #endif  // CHROME_BROWSER_UPGRADE_DETECTOR_H_