content: Cleanup class/struct forward declarations

content/browser/service_worker/service_worker_registration_handle.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_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/browser/service_worker/service_worker_version.h"
 #include "content/common/service_worker/service_worker_types.h"
 
 namespace content {
 
 class ServiceWorkerContextCore;
-class ServiceWorkerDispatcherHost;
 class ServiceWorkerVersion;
 
 // Roughly corresponds to one WebServiceWorkerRegistration object in the
 // renderer process.
 //
 // The renderer process maintains the reference count by owning a
 // ServiceWorkerRegistrationHandleReference for each reference it has to the
 // registration object. ServiceWorkerRegistrationHandleReference creation and
 // destruction sends an IPC to the browser process, which adjusts the
 // ServiceWorkerRegistrationHandle refcount.
@@ skipping 45 matching lines @@
 
   // This handle is the primary owner of this registration.
   scoped_refptr<ServiceWorkerRegistration> registration_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistrationHandle);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_