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 bb6cbbe1688c3a14d306c5339f45010a657722aa..189496bebaf63b9fee8e9961d839b735ec3ce2ae 100644
--- a/chrome/browser/sessions/session_restore.cc
+++ b/chrome/browser/sessions/session_restore.cc
@@ -32,6 +32,7 @@
 #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"
@@ -51,6 +52,10 @@ using content::NavigationController;
 using content::RenderWidgetHost;
 using content::WebContents;
 
+namespace content {
+class SessinStorageNamespace;
+}  // namespace content
+
 namespace {
 
 class SessionRestoreImpl;
@@ -875,6 +880,14 @@ class SessionRestoreImpl : public content::NotificationObserver {
 
     RecordAppLaunchForTab(browser, tab, selected_index);
 
+    // Associate sessionStorage (if any) to the restored tab.
+    content::SessionStorageNamespace* session_storage_namespace = NULL;

[michaeln, 2012/06/05 01:41:07]

probably s/b a scoped_refptr<> here

[marja, 2012/06/06 13:37:10]

Done.

+    if (!tab.session_storage_persistent_id.empty()) {
+      session_storage_namespace =
+          content::BrowserContext::GetDOMStorageContext(profile_)->
+          CreateSessionStorage(tab.session_storage_persistent_id);
+    }
+
     WebContents* web_contents =
         browser->AddRestoredTab(tab.navigations,
                                 tab_index,
@@ -883,7 +896,7 @@ class SessionRestoreImpl : public content::NotificationObserver {
                                 false,  // select
                                 tab.pinned,
                                 true,
-                                NULL);
+                                session_storage_namespace);
     // Regression check: check that the tab didn't start loading right away. The
     // focused tab will be loaded by Browser, and TabLoader will load the rest.
     DCHECK(web_contents->GetController().NeedsReload());