Move files from zip_archiver/unpacker/ to zip_archiver/.

ui/file_manager/zip_archiver/unpacker/cpp/volume_reader.h

-// Copyright 2014 The Chromium OS 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 VOLUME_READER_H_
-#define VOLUME_READER_H_
-
-#include <string>
-
-#include "archive.h"
-
-// Defines a reader for archive volumes. This class is used by libarchive
-// for custom reads: https://github.com/libarchive/libarchive/wiki/Examples
-class VolumeReader {
- public:
-  virtual ~VolumeReader() {}
-
-  // Tries to read bytes_to_read from the archive. The result will be stored at
-  // *destination_buffer, which is the address of a buffer handled by
-  // VolumeReaderJavaScriptStream. *destination_buffer must be available until
-  // the next VolumeReader:Read call or until VolumeReader is destructed.
-  //
-  // The operation must be synchronous (libarchive requirement), so it
-  // should NOT be done on the main thread. bytes_to_read should be > 0.
-  //
-  // Returns the actual number of read bytes or ARCHIVE_FATAL in case of
-  // failure.
-  virtual int64_t Read(int64_t bytes_to_read,
-                       const void** destination_buffer) = 0;
-
-  // Tries to skip bytes_to_skip number of bytes. Returns the actual number of
-  // skipped bytes or 0 if none were skipped. In case of failure
-  // VolumeReader::Skip returns 0 bytes and VolumeReader::Read can be used
-  // to skip those bytes by discarding them.
-  virtual int64_t Skip(int64_t bytes_to_skip) = 0;
-
-  // Tries to seek to offset from whence. Returns the resulting offset location
-  // or ARCHIVE_FATAL in case of errors. Similar to
-  // http://www.cplusplus.com/reference/cstdio/fseek/
-  virtual int64_t Seek(int64_t offset, int whence) = 0;
-
-  // Fetches a passphrase for reading. If the passphrase is not available it
-  // returns NULL.
-  virtual const char* Passphrase() = 0;
-};
-
-#endif  // VOLUME_READER_H_