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

chrome/browser/ui/ash/system_tray_delegate_utils.h

Index: chrome/browser/ui/ash/system_tray_delegate_utils.h
diff --git a/chrome/browser/ui/ash/system_tray_delegate_utils.h b/chrome/browser/ui/ash/system_tray_delegate_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..a7c8ea24a15745561bac9953ec75705b0487eb96
--- /dev/null
+++ b/chrome/browser/ui/ash/system_tray_delegate_utils.h
@@ -0,0 +1,21 @@
+// 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.
+
+#ifndef CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_UTILS_H_
+#define CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_UTILS_H_
+
+class UpgradeDetector;
+
+namespace ash {
+struct UpdateInfo;
+}
+
+namespace system_tray_delegate_utils {

[sky, 2014/10/03 16:28:45]

no namespace for this.

[ygorshenin1, 2014/10/03 17:05:29]

Done.

+
+// Fills |info| structure with data from |detector|.
+void GetUpdateInfo(const UpgradeDetector* detector, ash::UpdateInfo* info);
+
+}  // namespace system_tray_delegate_utils
+
+#endif  // CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_UTILS_H_