Remove duplicated headers

Source/web/NotificationPresenterImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #include "config.h"
 #include "NotificationPresenterImpl.h"
 
 #include "WebNotification.h"
 #include "WebNotificationPermissionCallback.h"
 #include "WebNotificationPresenter.h"
 #include "core/dom/ExecutionContext.h"
 #include "modules/notifications/Notification.h"
 #include "weborigin/SecurityOrigin.h"
-#include "wtf/PassRefPtr.h"
 
 using namespace WebCore;
 
 namespace blink {
 
 #if ENABLE(LEGACY_NOTIFICATIONS)
 class VoidCallbackClient : public WebNotificationPermissionCallback {
 public:
     explicit VoidCallbackClient(PassRefPtr<VoidCallback> callback)
         : m_callback(callback)
@@ skipping 79 matching lines @@
     m_presenter->requestPermission(WebSecurityOrigin(context->securityOrigin()), new VoidCallbackClient(callback));
 }
 #endif // ENABLE(LEGACY_NOTIFICATIONS)
 
 void NotificationPresenterImpl::requestPermission(ExecutionContext* context, WTF::PassRefPtr<NotificationPermissionCallback> callback)
 {
     m_presenter->requestPermission(WebSecurityOrigin(context->securityOrigin()), new NotificationPermissionCallbackClient(m_presenter, context->securityOrigin(), callback));
 }
 
 } // namespace blink