mandoline filesystem: Rewrite using base::File.

components/filesystem/futimens_android.cc

Index: components/filesystem/futimens_android.cc
diff --git a/components/filesystem/futimens_android.cc b/components/filesystem/futimens_android.cc
deleted file mode 100644
index 5dbae662cb41f530ec88e7650f0771e886de8b64..0000000000000000000000000000000000000000
--- a/components/filesystem/futimens_android.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2015 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 "components/filesystem/futimens.h"
-
-extern "C" {
-
-int futimens(int fd, const struct timespec times[2]) {
-  return utimensat(fd, nullptr, times, 0);
-}
-
-}  // extern "C"