Remove #pragma once from content

content/browser/download/download_interrupt_reasons_impl.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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_INTERRUPT_REASONS_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_INTERRUPT_REASONS_IMPL_H_
-#pragma once
 
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "net/base/net_errors.h"
 
 namespace content {
 
 enum DownloadInterruptSource {
   DOWNLOAD_INTERRUPT_FROM_DISK,
   DOWNLOAD_INTERRUPT_FROM_NETWORK,
   DOWNLOAD_INTERRUPT_FROM_SERVER,
   DOWNLOAD_INTERRUPT_FROM_USER,
   DOWNLOAD_INTERRUPT_FROM_CRASH
 };
 
 // Safe to call from any thread.
 DownloadInterruptReason CONTENT_EXPORT ConvertNetErrorToInterruptReason(
     net::Error file_error, DownloadInterruptSource source);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_INTERRUPT_REASONS_IMPL_H_