Restore sessionStorage when chrome restarts.

chrome/browser/sessions/session_service.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_SESSIONS_SESSION_SERVICE_H_
 #define CHROME_BROWSER_SESSIONS_SESSION_SERVICE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 416 matching lines @@
 
   // Are there any open trackable browsers?
   bool has_open_trackable_browsers_;
 
   // If true and a new tabbed browser is created and there are no opened tabbed
   // browser (has_open_trackable_browsers_ is false), then the current session
   // is made the last session. See description above class for details on
   // current/last session.
   bool move_on_new_browser_;
 
+  typedef std::map<int64,

[jochen (gone - plz use gerrit), 2011/12/13 13:47:32]

please add a comment what is mapped to what here

[marja, 2012/01/11 15:17:53]

Done.

+                   std::pair<SessionID, SessionID> > SessionStorageNamespaceMap;
+
+  SessionStorageNamespaceMap session_storage_namespace_map_;
+
   // Used for reporting frequency of session altering operations.
   base::TimeTicks last_updated_tab_closed_time_;
   base::TimeTicks last_updated_nav_list_pruned_time_;
   base::TimeTicks last_updated_nav_entry_commit_time_;
   base::TimeTicks last_updated_save_time_;
 
   // Constants used in calculating histogram data.
   const base::TimeDelta save_delay_in_millis_;
   const base::TimeDelta save_delay_in_mins_;
   const base::TimeDelta save_delay_in_hrs_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionService);
 };
 
 #endif  // CHROME_BROWSER_SESSIONS_SESSION_SERVICE_H_