Persist sessionStorage on disk.

chrome/browser/sessions/session_restore.cc

Index: chrome/browser/sessions/session_restore.cc
diff --git a/chrome/browser/sessions/session_restore.cc b/chrome/browser/sessions/session_restore.cc
index ffea378ce7c3c9325ce2b1387bcc5d231c1adacb..13a52e25e341e64534ab78aeccb243df8f4e45c2 100644
--- a/chrome/browser/sessions/session_restore.cc
+++ b/chrome/browser/sessions/session_restore.cc
@@ -32,12 +32,14 @@
 #include "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/child_process_security_policy.h"
+#include "content/public/browser/dom_storage_context.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
+#include "content/public/browser/session_storage_namespace.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "net/base/network_change_notifier.h"
@@ -886,6 +888,17 @@ class SessionRestoreImpl : public content::NotificationObserver {
     // focused tab will be loaded by Browser, and TabLoader will load the rest.
     DCHECK(web_contents->GetController().NeedsReload());
 
+    // Associate session storage.
+    if (tab.session_storage_real_id_associated) {
+      int64 namespace_id =
+          web_contents->GetController().GetSessionStorageNamespace()->id();
+      content::DOMStorageContext* dom_storage_context =
+          content::BrowserContext::GetDOMStorageContext(
+              web_contents->GetBrowserContext());
+      dom_storage_context-> AssociateSessionStorage(
+          namespace_id, tab.session_storage_real_id);
+    }
+
     // Set up the file access rights for the selected navigation entry.
     const int id = web_contents->GetRenderProcessHost()->GetID();
     const int read_file_permissions =