Migrate from URLs to Entries in the Files App's gallery.

chrome/browser/resources/file_manager/foreground/js/directory_model.js

 // 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.
 
 'use strict';
 
 // If directory files changes too often, don't rescan directory more than once
 // per specified interval
 var SIMULTANEOUS_RESCAN_INTERVAL = 1000;
 // Used for operations that require almost instant rescan.
@@ skipping 921 matching lines @@
   var fileList = this.getFileList();
   for (var i = 0; i < fileList.length; i++) {
     if (fileList.item(i).toURL() === entry.toURL()) {
       this.selectIndex(i);
       return;
     }
   }
 };
 
 /**
- * @param {Array.<string>} urls Array of URLs.
+ * @param {Array.<string>} entries Array of URLs.

[hirono, 2013/12/09 06:53:50]

nit: Please fix the comment.

[mtomasz, 2013/12/10 02:37:34]

Done.

  */
-DirectoryModel.prototype.selectUrls = function(urls) {
+DirectoryModel.prototype.selectEntries = function(entries) {
+  // URLs are needed here, since we are comparing Entries by URLs.
+  var urls = util.entriesToURLs(entries);
   var fileList = this.getFileList();
   this.fileListSelection_.beginChange();
   this.fileListSelection_.unselectAll();
   for (var i = 0; i < fileList.length; i++) {
     if (urls.indexOf(fileList.item(i).toURL()) >= 0)

[hirono, 2013/12/09 06:53:50]

1. Is it also needed to select child entries?

2. How about the following case?
url: http://xxx/drive/root/ABC
listItem: http://xxx/drive/root/A

[mtomasz, 2013/12/10 02:37:34]

I don't think so. This code just checks if the url is in the urls array.

       this.fileListSelection_.setIndexSelected(i, true);
   }
   this.fileListSelection_.endChange();
 };
 
 /**
  * @param {number} index Index of file.
  */
 DirectoryModel.prototype.selectIndex = function(index) {
   // this.focusCurrentList_();
@@ skipping 200 matching lines @@
   if (this.onSearchCompleted_) {
     this.removeEventListener('scan-completed', this.onSearchCompleted_);
     this.onSearchCompleted_ = null;
   }
 
   if (this.onClearSearch_) {
     this.onClearSearch_();
     this.onClearSearch_ = null;
   }
 };