Persist sessionStorage on disk.

webkit/dom_storage/dom_storage_namespace.h

Index: webkit/dom_storage/dom_storage_namespace.h
diff --git a/webkit/dom_storage/dom_storage_namespace.h b/webkit/dom_storage/dom_storage_namespace.h
index 6063266a498ff242114bd9748f384b59abe15d37..10d9e69dc385e6d0c61ea13a6c3662122a98c74b 100644
--- a/webkit/dom_storage/dom_storage_namespace.h
+++ b/webkit/dom_storage/dom_storage_namespace.h
@@ -18,6 +18,7 @@ namespace dom_storage {
 
 class DomStorageArea;
 class DomStorageTaskRunner;
+class SessionStorageDatabase;
 
 // Container for the set of per-origin Areas.
 // See class comments for DomStorageContext for a larger overview.
@@ -34,6 +35,12 @@ class DomStorageNamespace
   DomStorageNamespace(int64 namespace_id,
                       DomStorageTaskRunner* task_runner);
 
+  // Constructor for a SessionStorage namespace with a non-zero id and backing
+  // on disk via |session_storage_database|.
+  DomStorageNamespace(int64 namespace_id,
+                      SessionStorageDatabase* session_storage_database,
+                      DomStorageTaskRunner* task_runner);
+
   int64 namespace_id() const { return namespace_id_; }
 
   // Returns the storage area for the given origin,
@@ -74,6 +81,7 @@ class DomStorageNamespace
   FilePath directory_;
   AreaMap areas_;
   scoped_refptr<DomStorageTaskRunner> task_runner_;
+  scoped_refptr<SessionStorageDatabase> session_storage_database_;
 };
 
 }  // namespace dom_storage