Use a direct include of strings headers in base/.

base/process_util_openbsd.cc

 // 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.
 
 #include "base/process_util.h"
 
 #include <ctype.h>
 #include <dirent.h>
 #include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/user.h>
 #include <sys/wait.h>
 #include <time.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "base/string_tokenizer.h"
-#include "base/string_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "base/sys_info.h"
 #include "base/threading/thread_restrictions.h"
 
 namespace base {
 
 ProcessId GetParentProcessId(ProcessHandle process) {
   struct kinfo_proc info;
   size_t length;
   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
                 sizeof(struct kinfo_proc), 0 };
@@ skipping 28 matching lines @@
   return FilePath();
 }
 
 void EnableTerminationOnOutOfMemory() {
 }
 
 void EnableTerminationOnHeapCorruption() {
 }
 
 }  // namespace base