[MD History] Fix toolbar dates in grouped mode.

chrome/browser/resources/history/history.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.
 
 // <include src="../uber/uber_utils.js">
 // <include src="history_focus_manager.js">
 
 ///////////////////////////////////////////////////////////////////////////////
 // Globals:
 /** @const */ var RESULTS_PER_PAGE = 150;
@@ skipping 613 matching lines @@
  */
 HistoryModel.prototype.addResults = function(info, results) {
   // If no requests are in flight then this was an old request so we drop the
   // results. Double check the search term as well.
   if (!this.inFlight_ || info.term != this.searchText_)
     return;
 
   $('loading-spinner').hidden = true;
   this.inFlight_ = false;
   this.isQueryFinished_ = info.finished;
-  this.queryStartTime = info.queryStartTime;
-  this.queryEndTime = info.queryEndTime;
+  this.queryInterval = info.queryInterval;
 
   var lastVisit = this.visits_.slice(-1)[0];
   var lastDay = lastVisit ? lastVisit.dateRelativeDay : null;
 
   for (var i = 0, result; result = results[i]; i++) {
     var thisDay = result.dateRelativeDay;
     var isSameDay = lastDay == thisDay;
     this.visits_.push(new Visit(result, isSameDay, this));
     lastDay = thisDay;
   }
@@ skipping 926 matching lines @@
 HistoryView.prototype.addTimeframeInterval_ = function(resultsFragment) {
   if (this.getRangeInDays() == HistoryModel.Range.ALL_TIME)
     return;
 
   // If this is a time range result add some text that shows what is the
   // time range for the results the user is viewing.
   var timeFrame = resultsFragment.appendChild(
       createElementWithClassName('h2', 'timeframe'));
   // TODO(sergiu): Figure the best way to show this for the first day of
   // the month.
-  timeFrame.appendChild(document.createTextNode(loadTimeData.getStringF(
-      'historyInterval',
-      this.model_.queryStartTime,
-      this.model_.queryEndTime)));
+  timeFrame.appendChild(
+      document.createTextNode(this.model_.queryInterval));
 };
 
 /**
  * Update the page with results.
  * @param {boolean} doneLoading Whether the current request is complete.
  * @private
  */
 HistoryView.prototype.displayResults_ = function(doneLoading) {
   // Either show a page of results received for the all time results or all the
   // received results for the weekly and monthly view.
@@ skipping 817 matching lines @@
     historyView.reload();
 }
 
 // Add handlers to HTML elements.
 document.addEventListener('DOMContentLoaded', load);
 
 // This event lets us enable and disable menu items before the menu is shown.
 document.addEventListener('canExecute', function(e) {
   e.canExecute = true;
 });