Remove #pragma once from content

content/shell/shell_download_manager_delegate.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_SHELL_SHELL_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_SHELL_SHELL_DOWNLOAD_MANAGER_DELEGATE_H_
-#pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/download_manager_delegate.h"
 
 namespace content {
 
 class DownloadManager;
 
 class ShellDownloadManagerDelegate
@@ skipping 18 matching lines @@
                        const FilePath& suggested_path);
 
   DownloadManager* download_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellDownloadManagerDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_SHELL_DOWNLOAD_MANAGER_DELEGATE_H_