Revert of Remove header dependencies from sequence_checker.h to sequenced_worker_pool.h

content/browser/push_messaging/push_messaging_router.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_ROUTER_H_
 #define CONTENT_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_ROUTER_H_
 
 #include <stdint.h>
 
-#include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/public/common/push_messaging_status.h"
 #include "third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerEventResult.h"
 #include "url/gurl.h"
 
 namespace content {
 
@@ skipping 52 matching lines @@
       const scoped_refptr<ServiceWorkerRegistration>&
           service_worker_registration,
       ServiceWorkerStatusCode service_worker_status);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PushMessagingRouter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_ROUTER_H_