Move file_util to base/files/ directory.

base/mac/mac_util_unittest.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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/mac_util.h"
 
-#include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/sys_info.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 #include <errno.h>
 #include <sys/xattr.h>
@@ skipping 258 matching lines @@
   ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   FilePath non_existent_path = temp_dir_.path().Append("DummyPath");
   ASSERT_FALSE(PathExists(non_existent_path));
   EXPECT_FALSE(RemoveQuarantineAttribute(non_existent_path));
 }
 
 }  // namespace
 
 }  // namespace mac
 }  // namespace base