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

chrome/browser/ui/ash/system_tray_delegate_utils.cc

+// Copyright 2014 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/ash/system_tray_delegate_utils.h"
+
+#include "ash/system/tray/system_tray_delegate.h"
+#include "base/logging.h"
+#include "chrome/browser/upgrade_detector.h"
+
+void GetUpdateInfo(const UpgradeDetector* detector, ash::UpdateInfo* info) {
+  DCHECK(detector);
+  DCHECK(info);
+  switch (detector->upgrade_notification_stage()) {
+    case UpgradeDetector::UPGRADE_ANNOYANCE_CRITICAL:
+    case UpgradeDetector::UPGRADE_ANNOYANCE_SEVERE:
+      info->severity = ash::UpdateInfo::UPDATE_SEVERE_RED;
+      break;
+    case UpgradeDetector::UPGRADE_ANNOYANCE_HIGH:
+      info->severity = ash::UpdateInfo::UPDATE_HIGH_ORANGE;
+      break;
+    case UpgradeDetector::UPGRADE_ANNOYANCE_ELEVATED:
+      info->severity = ash::UpdateInfo::UPDATE_LOW_GREEN;
+      break;
+    case UpgradeDetector::UPGRADE_ANNOYANCE_LOW:
+    case UpgradeDetector::UPGRADE_ANNOYANCE_NONE:
+      info->severity = ash::UpdateInfo::UPDATE_NORMAL;
+      break;
+  }
+  info->update_required = detector->notify_upgrade();
+  info->factory_reset_required = detector->is_factory_reset_required();
+}