[MD History] Add URL parameter for search.

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.
 
 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: Object,
 
     /** @type {!QueryResult} */
     queryResult: Object,
   },
 
   observers: [
-    'searchTermChanged_(queryState.searchTerm)',
     'groupedRangeChanged_(queryState.range)',
   ],
 
   listeners: {
     'load-more-history': 'loadMoreHistory_',
   },
 
   /**
    * @param {HistoryQuery} info An object containing information about the
    *    query.
@@ skipping 13 matching lines @@
       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 || this.queryResult.results == null ||
-        queryState.queryingDisabled) {
+    // Disable querying until the first set of results have been returned. If
+    // there is a search, query immediately to support search query params from
+    // the URL.
+    var noResults = !this.queryResult || this.queryResult.results == null;
+    if (queryState.queryingDisabled ||
+        (!this.queryState.searchTerm && noResults)) {
       return;
     }
 
     this.set('queryState.querying', true);
     this.set('queryState.incremental', incremental);
 
 
     var lastVisitTime = 0;
     if (incremental) {
       var lastVisit = this.queryResult.results.slice(-1)[0];
@@ skipping 18 matching lines @@
    * a dialog to confirm that the deletion should be performed.
    */
   deleteSelectedWithPrompt: function() {
     if (!loadTimeData.getBoolean('allowDeletingHistory'))
       return;
 
     this.$.dialog.open();
   },
 
   /**
-   * @param {string} searchTerm
-   * @private
-   */
-  searchTermChanged_: function(searchTerm) { this.queryHistory(false); },
-
-  /**
    * @param {HistoryRange} range
    * @private
    */
   groupedRangeChanged_: function(range) {
     this.selectedPage_ = this.queryState.range == HistoryRange.ALL_TIME ?
       'infinite-list' : 'grouped-list';
 
     this.queryHistory(false);
   },
 
@@ skipping 28 matching lines @@
   onDialogConfirmTap_: function() {
     this.$['infinite-list'].deleteSelected();
     this.$.dialog.close();
   },
 
   /** @private */
   onDialogCancelTap_: function() {
     this.$.dialog.close();
   }
 });