Session restore: Store and restore persistent IDs for sessionStorage.

webkit/dom_storage/dom_storage_session.h

Index: webkit/dom_storage/dom_storage_session.h
diff --git a/webkit/dom_storage/dom_storage_session.h b/webkit/dom_storage/dom_storage_session.h
index 6de9f953882ac720779c969cb5f44081b72b4c7b..6f16943e1401a94bf4fafdeec309161712044e71 100644
--- a/webkit/dom_storage/dom_storage_session.h
+++ b/webkit/dom_storage/dom_storage_session.h
@@ -34,6 +34,7 @@ class DomStorageSession
   const std::string& persistent_namespace_id() const {
     return persistent_namespace_id_;
   }
+  void SetShouldPersist(bool should_persist);
   DomStorageSession* Clone();
 
   // Constructs a |DomStorageSession| by cloning
@@ -52,6 +53,7 @@ class DomStorageSession
   scoped_refptr<DomStorageContext> context_;
   int64 namespace_id_;
   std::string persistent_namespace_id_;
+  bool should_persist_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DomStorageSession);
 };