Move file_util to base/files/ directory.

base/security_unittest.cc

 // Copyright (c) 2013 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 <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
 #include <algorithm>
 #include <limits>
 
-#include "base/file_util.h"
+#include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_POSIX)
 #include <sys/mman.h>
 #include <unistd.h>
 #endif
 
@@ skipping 257 matching lines @@
   // kRandomMask, so we use it as an additional detection mechanism.
   const uintptr_t kRandomMask = 0x3fffffffffffULL;
   bool impossible_random_address =
       reinterpret_cast<uintptr_t>(ptr.get()) & ~kRandomMask;
   EXPECT_FALSE(impossible_random_address);
 }
 
 #endif  // defined(OS_LINUX) && defined(__x86_64__)
 
 }  // namespace