Remove MTP support on Linux.

chrome/browser/media_galleries/linux/mtp_read_file_worker.h

-// 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.
-
-#ifndef CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_
-#define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_
-
-#include <stdint.h>
-
-#include <memory>
-#include <string>
-
-#include "base/callback.h"
-#include "base/files/file.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-
-namespace base {
-class FilePath;
-}
-
-class SnapshotFileDetails;
-struct SnapshotRequestInfo;
-
-// Worker class to copy the contents of the media transfer protocol(MTP) device
-// file to the given snapshot file.
-class MTPReadFileWorker {
- public:
-  explicit MTPReadFileWorker(const std::string& device_handle);
-  ~MTPReadFileWorker();
-
-  // Dispatches the request to MediaTransferProtocolManager to get the media
-  // file contents.
-  //
-  // |request_info| specifies the snapshot file request params.
-  // |snapshot_file_info| specifies the metadata of the snapshot file.
-  void WriteDataIntoSnapshotFile(
-      const SnapshotRequestInfo& request_info,
-      const base::File::Info& snapshot_file_info);
-
- private:
-  // Called when WriteDataIntoSnapshotFile() completes.
-  //
-  // |snapshot_file_details| contains the current state of the snapshot file
-  // (such as how many bytes written to the snapshot file, media device file
-  // path, snapshot file path, bytes remaining, etc).
-  //
-  // If there is an error, |snapshot_file_details.error_callback| is invoked on
-  // the IO thread to notify the caller about the failure.
-  //
-  // If there is no error, |snapshot_file_details.success_callback| is invoked
-  // on the IO thread to notify the caller about the success.
-  void OnDidWriteIntoSnapshotFile(
-      std::unique_ptr<SnapshotFileDetails> snapshot_file_details);
-
-  // Dispatches the request to MediaTransferProtocolManager to get the device
-  // media file data chunk based on the parameters in |snapshot_file_details|.
-  void ReadDataChunkFromDeviceFile(
-      std::unique_ptr<SnapshotFileDetails> snapshot_file_details);
-
-  // Called when ReadDataChunkFromDeviceFile() completes.
-  //
-  // If there is no error, |data| will contain the data chunk and |error| is
-  // set to false.
-  //
-  // If there is an error, |data| is empty and |error| is set to true.
-  void OnDidReadDataChunkFromDeviceFile(
-      std::unique_ptr<SnapshotFileDetails> snapshot_file_details,
-      const std::string& data,
-      bool error);
-
-  // Called when the data chunk is written to the
-  // |snapshot_file_details_.snapshot_file_path|.
-  //
-  // If the write operation succeeds, |bytes_written| is set to a non-zero
-  // value.
-  //
-  // If the write operation fails, |bytes_written| is set to zero.
-  void OnDidWriteDataChunkIntoSnapshotFile(
-      std::unique_ptr<SnapshotFileDetails> snapshot_file_details,
-      uint32_t bytes_written);
-
-  // The device unique identifier to query the device.
-  const std::string device_handle_;
-
-  // For callbacks that may run after destruction.
-  base::WeakPtrFactory<MTPReadFileWorker> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(MTPReadFileWorker);
-};
-
-#endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_