Remove #pragma once from content

content/common/set_process_title_linux.h

 // Copyright (c) 2009 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_COMMON_SET_PROCESS_TITLE_LINUX_H_
 #define CONTENT_COMMON_SET_PROCESS_TITLE_LINUX_H_
-#pragma once
 
 // Set the process title that will show in "ps" and similar tools. Takes
 // printf-style format string and arguments. After calling setproctitle()
 // the original main() argv[] array should not be used. By default, the
 // original argv[0] is prepended to the format; this can be disabled by
 // including a '-' as the first character of the format string.
 //
 // This signature and naming is to be compatible with most other Unix
 // implementations of setproctitle().
 void setproctitle(const char* fmt, ...);
 
 // Initialize state needed for setproctitle() on Linux. Pass the argv pointer
 // from main() to setproctitle_init() before calling setproctitle().
 void setproctitle_init(const char** main_argv);
 
 #endif  // CONTENT_COMMON_SET_PROCESS_TITLE_LINUX_H_