Restore sessionStorage when chrome restarts.

content/public/browser/notification_types.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 394 matching lines @@
 
   // Sent before the repost form warning is brought up.
   // The source is a NavigationController.
   NOTIFICATION_REPOST_WARNING_SHOWN,
 
   // Sent when the zoom level changes. The source is the HostZoomMap.  The
   // details is a string of the hostname for which the zoom changed.  In case
   // of a temporary zoom level change, the details is an empty string.
   NOTIFICATION_ZOOM_LEVEL_CHANGED,
 
+  // Sent when a |DOMStorageNamespace| for sessionStorage is created. The source
+  // is the |DOMStorageMessageFilter| which initiated the creation of the
+  // |DOMStorageNamespace|. The details are in a
+  // |Details<SessionStorageNamespaceCreatedDetails>|.
+  NOTIFICATION_SESSION_STORAGE_NAMESPACE_CREATED,
+
   // Custom notifications used by the embedder should start from here.
   NOTIFICATION_CONTENT_END,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_