Rename variable, class, function, etc from libarchive to minizip.

ui/file_manager/zip_archiver/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>
 
-// Defines a reader for archive volumes. This class is used by libarchive
-// for custom reads: https://github.com/libarchive/libarchive/wiki/Examples
+// Defines a reader for archive volumes. This class is used by minizip
+// for custom reads.
 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
+  // The operation must be synchronous (minizip 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 -1 in case of failure.
   virtual int64_t Read(int64_t bytes_to_read,
                        const void** destination_buffer) = 0;
 
   // Tries to seek to offset from whence. Returns the resulting offset location
   // or -1 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 nullptr.
   virtual const char* Passphrase() = 0;
 
   virtual int64_t offset() = 0;
 
   virtual int64_t archive_size() = 0;
 };
 
 #endif  // VOLUME_READER_H_