Remove #pragma once from content

content/public/common/child_process_sandbox_support_linux.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_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_
 #define CONTENT_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_
-#pragma once
 
 #include <stdint.h>
 #include <string>
 
 #include "content/common/content_export.h"
 
 namespace content {
 
 // Returns a file descriptor for a shared memory segment.  The
 // executable flag indicates that the caller intends to use mprotect
@@ skipping 19 matching lines @@
 //     which case output_length will be set to the required size in bytes.
 //   output_length: size of output, if it's not 0.
 //
 //   returns: true on success.
 CONTENT_EXPORT bool GetFontTable(int fd, uint32_t table, uint8_t* output,
                                  size_t* output_length);
 
 };  // namespace content
 
 #endif  // CONTENT_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_