[MD History] Fix issues caused by refactor.

chrome/browser/resources/md_history/list_container.js

 // Copyright 2016 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.
 
-/**
- * @typedef {{results: ?Array<!HistoryEntry>,
- *            info: ?HistoryQuery}}
- */
-var QueryResult;
-
 Polymer({
   is: 'history-list-container',
 
   properties: {
     // The path of the currently selected page.
     selectedPage_: String,
 
     // Whether domain-grouped history is enabled.
     grouped: Boolean,
 
     /** @type {!QueryState} */
-    queryState: {
-      type: Object,
-    },
+    queryState: Object,
 
     /** @type {!QueryResult} */
-    queryResult_: {
-      type: Object,
-      readOnly: true,
-      value: function() {
-        return {
-          info: null,
-          results: null,
-        };
-      }
-    },
+    queryResult: Object,
   },
 
   observers: [
     'searchTermChanged_(queryState.searchTerm)',
     'groupedRangeChanged_(queryState.range)',
   ],
 
   listeners: {
     'load-more-history': 'loadMoreHistory_',
   },
 
   /**
    * @param {HistoryQuery} info An object containing information about the
    *    query.
    * @param {!Array<HistoryEntry>} results A list of results.
    */
   historyResult: function(info, results) {
     this.initializeResults_(info, results);
 
-    this.set('queryResult_.info', info);
-    this.set('queryResult_.results', results);
-
     if (this.selectedPage_ == 'grouped-list') {
       this.$$('#grouped-list').historyData = results;
       return;
     }
 
     var list = /** @type {HistoryListElement} */(this.$['infinite-list']);
     list.addNewResults(results);
     if (info.finished)
       list.disableResultLoading();
   },
 
   /**
    * Queries the history backend for results based on queryState.
    * @param {boolean} incremental Whether the new query should continue where
    *    the previous query stopped.
    */
   queryHistory: function(incremental) {
     var queryState = this.queryState;
     // Disable querying until the first set of results have been returned.
-    if (this.queryResult_.results == null || queryState.queryingDisabled)
+    if (!this.queryResult || this.queryResult.results == null ||
+        queryState.queryingDisabled) {
       return;
+    }
 
     this.set('queryState.querying', true);
     this.set('queryState.incremental', incremental);
 
 
     var lastVisitTime = 0;
     if (incremental) {
-      var lastVisit = this.queryResult_.results.slice(-1)[0];
+      var lastVisit = this.queryResult.results.slice(-1)[0];
       lastVisitTime = lastVisit ? lastVisit.time : 0;
     }
 
     var maxResults =
       queryState.range == HistoryRange.ALL_TIME ? RESULTS_PER_PAGE : 0;
     chrome.send('queryHistory', [
       queryState.searchTerm, queryState.groupedOffset, queryState.range,
       lastVisitTime, maxResults
     ]);
   },
@@ skipping 45 matching lines @@
       results[i].selected = false;
       results[i].readableTimestamp =
           info.term == '' ? results[i].dateTimeOfDay : results[i].dateShort;
 
       if (results[i].dateRelativeDay != currentDate) {
         currentDate = results[i].dateRelativeDay;
       }
     }
   },
 });