Replace paper-checkbox with a paper-icon-button-light

chrome/browser/resources/md_history/history_item.js

 // Copyright 2015 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('md_history', function() {
   var HistoryItem = Polymer({
     is: 'history-item',
 
     properties: {
       // Underlying HistoryEntry data for this item. Contains read-only fields
       // from the history backend, as well as fields computed by history-list.
       item: {type: Object, observer: 'showIcon_'},
 
       // Search term used to obtain this history-item.
       searchTerm: {type: String},
 
-      selected: {type: Boolean, notify: true},
+      selected: {type: Boolean, reflectToAttribute: true},
 
       isFirstItem: {type: Boolean, reflectToAttribute: true},
 
       isCardStart: {type: Boolean, reflectToAttribute: true},
 
       isCardEnd: {type: Boolean, reflectToAttribute: true},
 
       // True if the item is being displayed embedded in another element and
       // should not manage its own borders or size.
       embedded: {type: Boolean, reflectToAttribute: true},
@@ skipping 39 matching lines @@
      */
     getEntrySummary_: function() {
       var item = this.item;
       return loadTimeData.getStringF(
           'entrySummary', item.dateTimeOfDay,
           item.starred ? loadTimeData.getString('bookmarked') : '', item.title,
           item.domain);
     },
 
     /**
+     * @param {boolean} selected
+     * @return {string}
+     * @private
+     */
+    getAriaChecked_: function(selected) {
+      return selected ? 'true' : 'false';
+    },
+
+    /**
      * Remove bookmark of current item when bookmark-star is clicked.
      * @private
      */
     onRemoveBookmarkTap_: function() {
       if (!this.item.starred)
         return;
 
       if (this.$$('#bookmark-star') == this.root.activeElement)
         this.$['menu-button'].focus();
 
@@ skipping 95 matching lines @@
 
     if (searchedTerm)
       return currentItem.dateShort != nextItem.dateShort;
 
     return currentItem.time - nextItem.time > BROWSING_GAP_TIME &&
         currentItem.dateRelativeDay == nextItem.dateRelativeDay;
   };
 
   return { HistoryItem: HistoryItem };
 });