Revert of Initial version of new file wrapper

webrtc/base/file.cc

-/*
- *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/file.h"
-
-namespace rtc {
-
-File::File(PlatformFile file) : file_(file) {}
-
-File::~File() {
-  Close();
-}
-
-File::File(File&& other) : file_(other.file_) {
-  other.file_ = kInvalidPlatformFileValue;
-}
-
-File& File::operator=(File&& other) {
-  Close();
-  file_ = other.file_;
-  other.file_ = kInvalidPlatformFileValue;
-  return *this;
-}
-
-bool File::IsOpen() {
-  return file_ != kInvalidPlatformFileValue;
-}
-
-}  // namespace rtc