Remove #pragma once. Just from base/ for now.

base/mac/authorization_util.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 BASE_MAC_AUTHORIZATION_UTIL_H_
 #define BASE_MAC_AUTHORIZATION_UTIL_H_
-#pragma once
 
 // AuthorizationExecuteWithPrivileges fork()s and exec()s the tool, but it
 // does not wait() for it.  It also doesn't provide the caller with access to
 // the forked pid.  If used irresponsibly, zombie processes will accumulate.
 //
 // Apple's really gotten us between a rock and a hard place, here.
 //
 // Fortunately, AuthorizationExecuteWithPrivileges does give access to the
 // tool's stdout (and stdin) via a FILE* pipe.  The tool can output its pid
 // to this pipe, and the main program can read it, and then have something
@@ skipping 47 matching lines @@
                                       const char* tool_path,
                                       AuthorizationFlags options,
                                       const char** arguments,
                                       FILE** pipe,
                                       int* exit_status);
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_AUTHORIZATION_UTIL_H_