Remove #pragma once from content

content/browser/download/download_item_factory.h

 // 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.
 //
 // The DownloadItemFactory is used to produce different DownloadItems.
 // It is separate from the DownloadManager to allow download manager
 // unit tests to control the items produced.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_
-#pragma once
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/download/download_item_impl.h"
 
 struct DownloadCreateInfo;
 class DownloadRequestHandleInterface;
 class FilePath;
 class GURL;
@@ skipping 33 matching lines @@
       const GURL& url,
       bool is_otr,
       content::DownloadId download_id,
       const std::string& mime_type,
       const net::BoundNetLog& bound_net_log) = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_