Remove base/platform_file.*

base/files/scoped_platform_file_closer.h

-// Copyright 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.
-
-#ifndef BASE_FILES_SCOPED_PLATFORM_FILE_CLOSER_H_
-#define BASE_FILES_SCOPED_PLATFORM_FILE_CLOSER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/platform_file.h"
-
-namespace base {
-
-namespace internal {
-
-struct BASE_EXPORT PlatformFileCloser {
-  void operator()(PlatformFile* file) const;
-};
-
-}  // namespace internal
-
-typedef scoped_ptr<PlatformFile, internal::PlatformFileCloser>
-    ScopedPlatformFileCloser;
-
-}  // namespace base
-
-#endif  // BASE_FILES_SCOPED_PLATFORM_FILE_CLOSER_H_