Use a direct include of strings headers in base/.

base/process_util_mac.mm

 // 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.
 
 #include "base/process_util.h"
 
 #import <Cocoa/Cocoa.h>
 #include <crt_externs.h>
 #include <errno.h>
 #include <mach/mach.h>
@@ skipping 15 matching lines @@
 
 #include "base/debug/debugger.h"
 #include "base/file_util.h"
 #include "base/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_mach_port.h"
 #include "base/posix/eintr_wrapper.h"
 #include "base/scoped_clear_errno.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/sys_info.h"
 #include "third_party/apple_apsl/CFBase.h"
 #include "third_party/apple_apsl/malloc.h"
 
 #if ARCH_CPU_32_BITS
 #include <dlfcn.h>
 #include <mach-o/nlist.h>
 
 #include "base/threading/thread_local.h"
 #include "third_party/mach_override/mach_override.h"
@@ skipping 853 matching lines @@
   }
 }
 
 }  // namespace
 
 void EnsureProcessTerminated(ProcessHandle process) {
   WaitForChildToDie(process, kWaitBeforeKillSeconds);
 }
 
 }  // namespace base