Fix up SequencedWorkerPool in preparation for making it a TaskRunner

webkit/dom_storage/dom_storage_session.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 "webkit/dom_storage/dom_storage_session.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
+#include "base/tracked_objects.h"
 #include "webkit/dom_storage/dom_storage_context.h"
 #include "webkit/dom_storage/dom_storage_task_runner.h"
 
 namespace dom_storage {
 
 DomStorageSession::DomStorageSession(DomStorageContext* context)
     : context_(context),
       namespace_id_(context->AllocateSessionId()) {
   context->task_runner()->PostTask(
       FROM_HERE,
@@ skipping 18 matching lines @@
 }
 
 DomStorageSession::~DomStorageSession() {
   context_->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&DomStorageContext::DeleteSessionNamespace,
                  context_, namespace_id_));
 }
 
 }  // namespace dom_storage