Persist sessionStorage on disk.

chrome/browser/sessions/session_types.cc

 // 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.
 
 #include "chrome/browser/sessions/session_types.h"
 
 #include "base/string_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "content/public/browser/navigation_controller.h"
@@ skipping 105 matching lines @@
            navigations.begin(); i != navigations.end(); ++i, ++page_id) {
     entries->push_back(i->ToNavigationEntry(page_id, profile));
   }
 }
 
 // SessionTab -----------------------------------------------------------------
 
 SessionTab::SessionTab()
     : tab_visual_index(-1),
       current_navigation_index(-1),
-      pinned(false) {
+      pinned(false),
+      session_storage_real_id(0),
+      session_storage_real_id_associated(false) {
 }
 
 SessionTab::~SessionTab() {
 }
 
 // SessionWindow ---------------------------------------------------------------
 
 SessionWindow::SessionWindow()
     : selected_tab_index(-1),
       type(Browser::TYPE_TABBED),
       is_constrained(true),
       show_state(ui::SHOW_STATE_DEFAULT) {
 }
 
 SessionWindow::~SessionWindow() {
   STLDeleteElements(&tabs);
 }