Make session restore understand that tabs have multiple SessionStorageNamespaces.

content/browser/storage_partition_impl.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 "content/browser/storage_partition_impl.h"
 
 #include "content/browser/fileapi/browser_file_system_helper.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "webkit/database/database_tracker.h"
@@ skipping 62 matching lines @@
 
   scoped_refptr<webkit_database::DatabaseTracker> database_tracker =
       new webkit_database::DatabaseTracker(
           partition_path, context->IsOffTheRecord(),
           context->GetSpecialStoragePolicy(), quota_manager->proxy(),
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
 
   FilePath path = context->IsOffTheRecord() ? FilePath() : partition_path;
   scoped_refptr<DOMStorageContextImpl> dom_storage_context =
       new DOMStorageContextImpl(path, context->GetSpecialStoragePolicy());
+  dom_storage_context->SetSaveSessionStorageOnDisk();
 
   scoped_refptr<IndexedDBContextImpl> indexed_db_context =
       new IndexedDBContextImpl(path, context->GetSpecialStoragePolicy(),
                                quota_manager->proxy(),
                                BrowserThread::GetMessageLoopProxyForThread(
                                    BrowserThread::WEBKIT_DEPRECATED));
 
   scoped_refptr<ChromeAppCacheService> appcache_service =
       new ChromeAppCacheService(quota_manager->proxy());
 
@@ skipping 24 matching lines @@
 
 DOMStorageContextImpl* StoragePartitionImpl::GetDOMStorageContext() {
   return dom_storage_context_;
 }
 
 IndexedDBContextImpl* StoragePartitionImpl::GetIndexedDBContext() {
   return indexed_db_context_;
 }
 
 }  // namespace content