PNaCl cleanup: Remove TempFile class and use base::File instead

components/nacl/renderer/plugin/temporary_file.cc

-// 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.
-
-#include "components/nacl/renderer/plugin/temporary_file.h"
-
-#include "base/logging.h"
-#include "build/build_config.h"
-#include "components/nacl/renderer/plugin/plugin.h"
-#include "components/nacl/renderer/plugin/utility.h"
-#include "ppapi/c/private/pp_file_handle.h"
-#include "ppapi/cpp/core.h"
-#include "ppapi/cpp/instance.h"
-#include "ppapi/cpp/module.h"
-
-namespace plugin {
-
-TempFile::TempFile(Plugin* plugin, PP_FileHandle handle)
-    : plugin_(plugin),
-      file_handle_(handle) { }
-
-TempFile::~TempFile() { }
-
-bool TempFile::Reset() {
-  // file_handle_, read_wrapper_ and write_wrapper_ are all backed by the
-  // same file handle/descriptor, so resetting the seek position of one
-  // will reset them all.
-  int64_t newpos = file_handle_.Seek(base::File::FROM_BEGIN, 0);
-  return newpos == 0;
-}
-
-int64_t TempFile::GetLength() {
-  return file_handle_.GetLength();
-}
-
-PP_FileHandle TempFile::TakeFileHandle() {
-  DCHECK(file_handle_.IsValid());
-  return file_handle_.TakePlatformFile();
-}
-
-PP_FileHandle TempFile::GetFileHandle() {
-  DCHECK(file_handle_.IsValid());
-  return file_handle_.GetPlatformFile();
-}
-
-}  // namespace plugin