Persist sessionStorage on disk.

webkit/dom_storage/session_storage_database.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 WEBKIT_DOM_STORAGE_SESSION_STORAGE_DATABASE_H_
 #define WEBKIT_DOM_STORAGE_SESSION_STORAGE_DATABASE_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 48 matching lines @@
 
   // Deletes the data for |namespace_id| and |origin|.
   bool DeleteArea(const std::string& namespace_id, const GURL& origin);
 
   // Deletes the data for |namespace_id|.
   bool DeleteNamespace(const std::string& namespace_id);
 
   // Reads all namespace IDs from the database.
   bool ReadNamespaceIds(std::vector<std::string>* namespace_ids);
 
+  // Reads all origins which have data stored in |namespace_id|.
+  bool ReadOriginsInNamespace(const std::string& namespace_id,
+                              std::vector<GURL>* origins);
+
  private:
   friend class base::RefCountedThreadSafe<SessionStorageDatabase>;
   friend class SessionStorageDatabaseTest;
 
   ~SessionStorageDatabase();
 
   // Opens the database at file_path_ if it exists already and creates it if
   // |create_if_needed| is true. Returns true if the database was opened, false
   // if the opening failed or was not necessary (the database doesn't exist and
   // |create_if_needed| is false). The possible failures are:
@@ skipping 109 matching lines @@
   bool db_error_;
   // True if the database is in an inconsistent state.
   bool is_inconsistent_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionStorageDatabase);
 };
 
 }  // namespace dom_storage
 
 #endif  // WEBKIT_DOM_STORAGE_SESSION_STORAGE_DATABASE_H_