Move files from zip_archiver/unpacker/ to zip_archiver/.

ui/file_manager/zip_archiver/js/compressor-foreground.js

 // Copyright 2017 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.
 
 window.onload = function() {
   chrome.runtime.getBackgroundPage(function(backgroundPage) {
 
     // Called from the background page. We need to place this function here
     // because chrome.fileSystem.chooseEntry only works on forground page.
     backgroundPage.unpacker.Compressor.prototype.createArchiveFileForeground_ =
@@ skipping 19 matching lines @@
 
     // Some compressors are waiting for this foreground page to be loaded.
     backgroundPage.unpacker.Compressor.CompressorIdQueue.forEach(
         function(compressorId) {
           var compressor =
               backgroundPage.unpacker.app.compressors[compressorId];
           compressor.createArchiveFileForeground_(compressorId);
         });
   });
 };