mandoline filesystem: Rewrite using base::File.

components/filesystem/shared_impl.h

-// 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.
-
-// Shared implementation of things common between |DirectoryImpl| and
-// |FileImpl|.
-
-#ifndef COMPONENTS_FILESYSTEM_SHARED_IMPL_H_
-#define COMPONENTS_FILESYSTEM_SHARED_IMPL_H_
-
-#include "components/filesystem/public/interfaces/types.mojom.h"
-#include "mojo/public/cpp/bindings/callback.h"
-
-namespace filesystem {
-
-// Stats the given FD (which must be valid), calling |callback| appropriately.
-// The type in the |FileInformation| given to the callback will be assigned from
-// |type|.
-using StatFDCallback = mojo::Callback<void(Error, FileInformationPtr)>;
-void StatFD(int fd, FileType type, const StatFDCallback& callback);
-
-// Touches the given FD (which must be valid), calling |callback| appropriately.
-using TouchFDCallback = mojo::Callback<void(Error)>;
-void TouchFD(int fd,
-             TimespecOrNowPtr atime,
-             TimespecOrNowPtr mtime,
-             const TouchFDCallback& callback);
-
-}  // namespace filesystem
-
-#endif  // COMPONENTS_FILESYSTEM_SHARED_IMPL_H_