MD History: Implement search functionality.

chrome/browser/resources/md_history/history_card.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-card',
 
   properties: {
     // The date of these history items.
     historyDate: {
       type: String,
       value: ''
     },
+
     // The list of history results that were accessed for a particular day in
     // reverse chronological order.
     historyItems: {
       type: Array,
       value: function() { return []; }
+    },
+
+    searchTerm: {
+      type: String,
+      value: ''
     }
   },
 
   /**
    * Check whether the time difference between the given historyItem and the
    * next one is large enough for a spacer to be required.
    * @param {number} index The index number of the first item being compared.
    * @return {boolean} Whether or not time gap separator is required.
    * @private
    */
   needsTimeGap_: function(index) {
     var items = this.historyItems;
     return index + 1 < items.length &&
         items[index].time - items[index + 1].time > BROWSING_GAP_TIME;
+  },
+
+  /**
+   * Checks whether the results returned are part of a search.
+   * @private
+   */
+  isNotSearchResult_: function(search) {
+    return search == '';
+  },
+
+  /**
+   * Create the title for the history-card holding all the search results.
+   * Found <numberOfItems> search result(s) for '<search>'.
+   * @private
+   */
+  searchResultTitle_: function(numberOfItems, search) {
+    var resultId = numberOfItems == 1 ? 'searchResult' : 'searchResults';
+    return loadTimeData.getStringF('foundSearchResults', numberOfItems,
+                                   loadTimeData.getString(resultId), search);
   }
 });