dbus: Remove dbus::FileDescriptor

dbus/file_descriptor.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 <algorithm>
-
-#include "base/bind.h"
-#include "base/files/file.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/threading/worker_pool.h"
-#include "dbus/file_descriptor.h"
-
-using std::swap;
-
-namespace dbus {
-
-void CHROME_DBUS_EXPORT FileDescriptor::Deleter::operator()(
-    FileDescriptor* fd) {
-  base::WorkerPool::PostTask(
-      FROM_HERE, base::Bind(&base::DeletePointer<FileDescriptor>, fd), false);
-}
-
-FileDescriptor::FileDescriptor(FileDescriptor&& other) : FileDescriptor() {
-  Swap(&other);
-}
-
-FileDescriptor::~FileDescriptor() {
-  if (owner_)
-    base::File auto_closer(value_);
-}
-
-FileDescriptor& FileDescriptor::operator=(FileDescriptor&& other) {
-  Swap(&other);
-  return *this;
-}
-
-int FileDescriptor::value() const {
-  CHECK(valid_);
-  return value_;
-}
-
-int FileDescriptor::TakeValue() {
-  CHECK(valid_);  // NB: check first so owner_ is unchanged if this triggers
-  owner_ = false;
-  return value_;
-}
-
-void FileDescriptor::CheckValidity() {
-  base::File file(value_);
-  if (!file.IsValid()) {
-    valid_ = false;
-    return;
-  }
-
-  base::File::Info info;
-  bool ok = file.GetInfo(&info);
-  file.TakePlatformFile();  // Prevent |value_| from being closed by |file|.
-  valid_ = (ok && !info.is_directory);
-}
-
-void FileDescriptor::Swap(FileDescriptor* other) {
-  swap(value_, other->value_);
-  swap(owner_, other->owner_);
-  swap(valid_, other->valid_);
-}
-
-}  // namespace dbus