Create and store persistent unique ids for sessionStorage.

webkit/dom_storage/dom_storage_context.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_DOM_STORAGE_CONTEXT_H_
 #define WEBKIT_DOM_STORAGE_DOM_STORAGE_CONTEXT_H_
 #pragma once
 
 #include <map>
 #include <vector>
@@ skipping 133 matching lines @@
       const GURL& page_url);
   void NotifyAreaCleared(
       const DomStorageArea* area,
       const GURL& page_url);
 
   // May be called on any thread.
   int64 AllocateSessionId() {
     return session_id_sequence_.GetNext();
   }
 
+  std::string AllocatePersistentSessionId();
+
   // Must be called on the background thread.
-  void CreateSessionNamespace(int64 namespace_id);
+  void CreateSessionNamespace(int64 namespace_id,
+                              const std::string& persistent_namespace_id);
   void DeleteSessionNamespace(int64 namespace_id);
-  void CloneSessionNamespace(int64 existing_id, int64 new_id);
+  void CloneSessionNamespace(int64 existing_id, int64 new_id,
+                             const std::string& new_persistent_id);
 
  private:
   friend class DomStorageContextTest;
   FRIEND_TEST_ALL_PREFIXES(DomStorageContextTest, Basics);
   friend class base::RefCountedThreadSafe<DomStorageContext>;
   typedef std::map<int64, scoped_refptr<DomStorageNamespace> >
       StorageNamespaceMap;
 
   ~DomStorageContext();
 
@@ skipping 21 matching lines @@
   base::AtomicSequenceNumber session_id_sequence_;
 
   bool is_shutdown_;
   bool force_keep_session_state_;
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
 };
 
 }  // namespace dom_storage
 
 #endif  // WEBKIT_DOM_STORAGE_DOM_STORAGE_CONTEXT_H_