MD Downloads: fix search spinner when terms are the same

chrome/browser/resources/md_downloads/action_service.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.
 
 cr.define('downloads', function() {
   /**
    * @param {string} chromeSendName
    * @return {function(string):void} A chrome.send() callback with curried name.
    */
   function chromeSendWithId(chromeSendName) {
@@ skipping 82 matching lines @@
 
     /** @param {string} id ID of the paused download to resume. */
     resume: chromeSendWithId('resume'),
 
     /**
      * @param {string} id ID of the dangerous download to save despite
      *     warnings.
      */
     saveDangerous: chromeSendWithId('saveDangerous'),
 
-    /** @param {string} searchText What to search for. */
+    /**
+     * @param {string} searchText What to search for.
+     * @return {boolean} Whether |searchText| resulted in new search terms.
+     */
     search: function(searchText) {
       var searchTerms = ActionService.splitTerms(searchText);
       var sameTerms = searchTerms.length == this.searchTerms_.length;
 
       for (var i = 0; sameTerms && i < searchTerms.length; ++i) {
         if (searchTerms[i] != this.searchTerms_[i])
           sameTerms = false;
       }
 
       if (sameTerms)
-        return;
+        return false;
 
       this.searchTerms_ = searchTerms;
       this.loadMore();
+      return true;
     },
 
     /**
      * Shows the local folder a finished download resides in.
      * @param {string} id ID of the download to show.
      */
     show: chromeSendWithId('show'),
 
     /** Undo download removal. */
     undo: chrome.send.bind(chrome, 'undo'),
   };
 
   cr.addSingletonGetter(ActionService);
 
   return {ActionService: ActionService};
 });