[cros] Fix UserImagesGrid display regression.

chrome/browser/resources/chromeos/user_images_grid.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.
 
 cr.define('options', function() {
   /** @const */ var ArrayDataModel = cr.ui.ArrayDataModel;
   /** @const */ var Grid = cr.ui.Grid;
   /** @const */ var GridItem = cr.ui.GridItem;
   /** @const */ var GridSelectionController = cr.ui.GridSelectionController;
   /** @const */ var ListSingleSelectionModel = cr.ui.ListSingleSelectionModel;
@@ skipping 128 matching lines @@
     /** @inheritDoc */
     decorate: function() {
       Grid.prototype.decorate.call(this);
       this.dataModel = new ArrayDataModel([]);
       this.itemConstructor = UserImagesGridItem;
       this.selectionModel = new ListSingleSelectionModel();
       this.inProgramSelection_ = false;
       this.addEventListener('dblclick', this.handleDblClick_.bind(this));
       this.addEventListener('change', this.handleChange_.bind(this));
       this.setAttribute('role', 'listbox');
+      this.autoExpands = true;
     },
 
     /**
      * Handles double click on the image grid.
      * @param {Event} e Double click Event.
      * @private
      */
     handleDblClick_: function(e) {
       // If a child element is double-clicked and not the grid itself, handle
       // this as 'Enter' keypress.
@@ skipping 510 matching lines @@
   UserImagesGrid.ButtonImages = {
     TAKE_PHOTO: 'chrome://theme/IDR_BUTTON_USER_IMAGE_TAKE_PHOTO',
     CHOOSE_FILE: 'chrome://theme/IDR_BUTTON_USER_IMAGE_CHOOSE_FILE',
     PROFILE_PICTURE: 'chrome://theme/IDR_PROFILE_PICTURE_LOADING'
   };
 
   return {
     UserImagesGrid: UserImagesGrid
   };
 });