[Galley] Fix an exception in clicking a thumbnail

chrome/browser/resources/file_manager/foreground/js/photo/gallery.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';
 
 /**
  * Called from the main frame when unloading.
  * @return {string?} User-visible message on null if it is OK to close.
  */
@@ skipping 619 matching lines @@
 };
 
 // Name box and rename support.
 
 /**
  * Updates the UI related to the selected item and the persistent state.
  *
  * @private
  */
 Gallery.prototype.updateSelectionAndState_ = function() {
-  var numSelectedItems = this.selectionModel_.length;
+  var selectedIndex = this.selectionModel_.selectedIndex;
+  var numSelectedItems = selectedIndex.length;

[hirono, 2014/02/13 06:42:22]

this.selectedIndexes.length?

[hirono, 2014/02/13 06:43:26]

No, this.selectionModel_.selectedIndexes.length?

   var displayName = '';
   var selectedEntryURL = null;
 
   // If it's selecting something, update the variable values.
   if (numSelectedItems) {
-    var selectedIndex = this.selectionModel_.selectedIndex;
     var selectedItem =
         this.dataModel_.item(this.selectionModel_.selectedIndex);
     this.selectedEntry_ = selectedItem.getEntry();
     selectedEntryURL = this.selectedEntry_.toURL();
 
     if (numSelectedItems === 1) {
       window.top.document.title = this.selectedEntry_.name;
       displayName = ImageUtil.getDisplayNameFromName(this.selectedEntry_.name);
     } else if (this.context_.curDirEntry) {
       // If the Gallery was opened on search results the search query will not
@@ skipping 208 matching lines @@
  */
 Gallery.prototype.updateButtons_ = function() {
   if (this.modeButton_) {
     var oppositeMode =
         this.currentMode_ === this.slideMode_ ? this.mosaicMode_ :
                                                 this.slideMode_;
     this.modeButton_.title =
         this.displayStringFunction_(oppositeMode.getTitle());
   }
 };