Remove #pragma once from content

content/browser/file_metadata_mac.h

 // Copyright (c) 2011 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_FILE_METADATA_MAC_H_
 #define CONTENT_BROWSER_FILE_METADATA_MAC_H_
-#pragma once
 
 class FilePath;
 class GURL;
 
 namespace file_metadata {
 
 // Adds origin metadata to the file.
 // |source| should be the source URL for the download, and |referrer| should be
 // the URL the user initiated the download from.
 void AddOriginMetadataToFile(const FilePath& file, const GURL& source,
                              const GURL& referrer);
 
 // Adds quarantine metadata to the file, assuming it has already been
 // quarantined by the OS.
 // |source| should be the source URL for the download, and |referrer| should be
 // the URL the user initiated the download from.
 void AddQuarantineMetadataToFile(const FilePath& file, const GURL& source,
                                  const GURL& referrer);
 
 }  // namespace file_metadata
 
 #endif  // CONTENT_BROWSER_FILE_METADATA_MAC_H_