Appcache, local storage, indexed db, databases: skip exit-time deletion when restarting.

content/browser/in_process_webkit/dom_storage_context.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 CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_CONTEXT_H_
 #define CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_CONTEXT_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 91 matching lines @@
   // The local storage file extension.
   static const FilePath::CharType kLocalStorageExtension[];
 
   // Get the file name of the local storage file for the given origin.
   FilePath GetLocalStorageFilePath(const string16& origin_id) const;
 
   void set_clear_local_state_on_exit_(bool clear_local_state) {
     clear_local_state_on_exit_ = clear_local_state;
   }
 
+  // Disables the exit-time deletion for all data (also session-only data).
+  void SaveSessionState() {
+    save_session_state_ = true;
+  }
+
   void set_data_path_for_testing(const FilePath& data_path) {
     data_path_ = data_path;
   }
 
  private:
 
   FRIEND_TEST_ALL_PREFIXES(DOMStorageTest, SessionOnly);
+  FRIEND_TEST_ALL_PREFIXES(DOMStorageTest, SaveSessionState);
 
   // Get the local storage instance.  The object is owned by this class.
   DOMStorageNamespace* CreateLocalStorage();
 
   // Get a new session storage namespace.  The object is owned by this class.
   DOMStorageNamespace* CreateSessionStorage(int64 namespace_id);
 
   // Used internally to register storage namespaces we create.
   void RegisterStorageNamespace(DOMStorageNamespace* storage_namespace);
 
   // The WebKit thread half of CloneSessionStorage above.  Static because
   // DOMStorageContext isn't ref counted thus we can't use a runnable method.
   // That said, we know this is safe because this class is destroyed on the
   // WebKit thread, so there's no way it could be destroyed before this is run.
   static void CompleteCloningSessionStorage(DOMStorageContext* context,
                                             int64 existing_id, int64 clone_id);
 
   // The last used storage_area_id and storage_namespace_id's.  For the storage
   // namespaces, IDs allocated on the UI thread are positive and count up while
   // IDs allocated on the IO thread are negative and count down.  This allows us
   // to allocate unique IDs on both without any locking.  All storage area ids
   // are allocated on the WebKit thread.
   int64 last_storage_area_id_;
   int64 last_session_storage_namespace_id_on_ui_thread_;
   int64 last_session_storage_namespace_id_on_io_thread_;
 
   // True if the destructor should delete its files.
   bool clear_local_state_on_exit_;
 
+  // If true, nothing (not even session-only data) should be deleted on exit.
+  bool save_session_state_;
+
   // Path where the browser context data is stored.
   // TODO(pastarmovj): Keep in mind that unlike indexed db data_path_ variable
   // this one still has to point to the upper level dir because of the
   // MigrateLocalStorageDirectory function. Once this function disappears we can
   // make it point directly to the dom storage path.
   FilePath data_path_;
 
   // All the DOMStorageMessageFilters that are attached to us. ONLY USE ON THE
   // IO THREAD!
   MessageFilterSet message_filter_set_;
 
   // Maps ids to StorageAreas.  We do NOT own these objects.  StorageNamespace
   // (which does own them) will notify us when we should remove the entries.
   typedef std::map<int64, DOMStorageArea*> StorageAreaMap;
   StorageAreaMap storage_area_map_;
 
   // Maps ids to StorageNamespaces.  We own these objects.
   typedef std::map<int64, DOMStorageNamespace*> StorageNamespaceMap;
   StorageNamespaceMap storage_namespace_map_;
 
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageContext);
 };
 
 #endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_CONTEXT_H_