Switch to standard integer types in sandbox/.

sandbox/linux/suid/process_util_linux.c

 // 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.
 
 // The following is the C version of code from base/process_utils_linux.cc.
 // We shouldn't link against C++ code in a setuid binary.
 
 // Needed for O_DIRECTORY, must be defined before fcntl.h is included
 // (and it can be included earlier than the explicit #include below
 // in some versions of glibc).
 #define _GNU_SOURCE
 
 #include "sandbox/linux/suid/process_util.h"
 
 #include <fcntl.h>
 #include <inttypes.h>
 #include <limits.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 // Ranges for the current (oom_score_adj) and previous (oom_adj)
 // flavors of OOM score.
 static const int kMaxOomScore = 1000;
@@ skipping 41 matching lines @@
   close(dirfd);
 
   char buf[11];  // 0 <= |score| <= kMaxOomScore; using log_10(2**32) + 1 size
   snprintf(buf, sizeof(buf), "%d", score);
   size_t len = strlen(buf);
 
   ssize_t bytes_written = write(fd, buf, len);
   close(fd);
   return (bytes_written == (ssize_t)len);
 }