Remove #pragma once from content

content/browser/download/download_file_manager.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 DownloadFileManager owns a set of DownloadFile objects, each of which
 // represent one in progress download and performs the disk IO for that
 // download. The DownloadFileManager itself is a singleton object owned by the
 // ResourceDispatcherHostImpl.
 //
 // The DownloadFileManager uses the file_thread for performing file write
@@ skipping 20 matching lines @@
 //
 // The DownloadFileManager tracks download requests, mapping from a download
 // ID (unique integer created in the IO thread) to the DownloadManager for the
 // contents (profile) where the download was initiated. In the event of a
 // contents closure during a download, the DownloadFileManager will continue to
 // route data to the appropriate DownloadManager. In progress downloads are
 // cancelled for a DownloadManager that exits (such as when closing a profile).
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_
-#pragma once
 
 #include <map>
 
 #include "base/atomic_sequence_num.h"
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 119 matching lines @@
 
   // A map of all in progress downloads.  It owns the download files.
   DownloadFileMap downloads_;
 
   scoped_ptr<DownloadFileFactory> download_file_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileManager);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_FILE_MANAGER_H_