Move file_util to base/files/ directory.

base/process/internal_linux.cc

 // 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/internal_linux.h"
 
 #include <unistd.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
-#include "base/file_util.h"
+#include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 
 namespace base {
 namespace internal {
 
@@ skipping 156 matching lines @@
   // which means the answer is 100.
   // It may be the case that this value is always 100.
   static const int kHertz = sysconf(_SC_CLK_TCK);
 
   return TimeDelta::FromMicroseconds(
       Time::kMicrosecondsPerSecond * clock_ticks / kHertz);
 }
 
 }  // namespace internal
 }  // namespace base