MD History: Prevent flickering of 'no search results' message

chrome/browser/resources/md_history/history_list.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.
 
 Polymer({
   is: 'history-list',
 
   properties: {
     // The search term for the current query. Set when the query returns.
     searchedTerm: {
@@ skipping 442 matching lines @@
    * @param {number} historyDataLength
    * @return {boolean}
    * @private
    */
   hasResults_: function(historyDataLength) {
     return historyDataLength > 0;
   },
 
   /**
    * @param {string} searchedTerm
-   * @param {boolean} isLoading
    * @return {string}
    * @private
    */
-  noResultsMessage_: function(searchedTerm, isLoading) {
-    if (isLoading)
-      return '';
-
+  noResultsMessage_: function(searchedTerm) {
     var messageId = searchedTerm !== '' ? 'noSearchResults' : 'noResults';
     return loadTimeData.getString(messageId);
   },
 
   /**
    * @param {HistoryQuery} info
    * @param {!Array<HistoryEntry>} results
    * @private
    */
   initializeResults_: function(info, results) {
     if (results.length == 0)
       return;
 
     var currentDate = results[0].dateRelativeDay;
 
     for (var i = 0; i < results.length; i++) {
       // Sets the default values for these fields to prevent undefined types.
       results[i].selected = false;
       results[i].readableTimestamp =
           info.term == '' ? results[i].dateTimeOfDay : results[i].dateShort;
 
       if (results[i].dateRelativeDay != currentDate) {
         currentDate = results[i].dateRelativeDay;
       }
     }
   },
 });