MD Downloads: declare/initialize ActionService#searchTerms_ in ctor

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) {
     return function(id) { chrome.send(chromeSendName, [id]); };
   }
 
   /** @constructor */
-  function ActionService() {}
+  function ActionService() {
+    /** @private {Array<string>} */
+    this.searchTerms_ = [];
+  }
 
   /**
    * @param {string} s
    * @return {string} |s| without whitespace at the beginning or end.
    */
   function trim(s) { return s.trim(); }
 
   /**
    * @param {string|undefined} value
    * @return {boolean} Whether |value| is truthy.
    */
   function truthy(value) { return !!value; }
 
   /**
    * @param {string} searchText Input typed by the user into a search box.
    * @return {Array<string>} A list of terms extracted from |searchText|.
    */
   ActionService.splitTerms = function(searchText) {
     // Split quoted terms (e.g., 'The "lazy" dog' => ['The', 'lazy', 'dog']).
     return searchText.split(/"([^"]*)"/).map(trim).filter(truthy);
   };
 
   ActionService.prototype = {
-    /** @private {Array<string>} */
-    searchTerms_: [],
-
     /** @param {string} id ID of the download to cancel. */
     cancel: chromeSendWithId('cancel'),
 
     /** Instructs the browser to clear all finished downloads. */
     clearAll: function() {
       if (loadTimeData.getBoolean('allowDeletingHistory')) {
         chrome.send('clearAll');
         this.search('');
       }
     },
@@ skipping 72 matching lines @@
     show: chromeSendWithId('show'),
 
     /** Undo download removal. */
     undo: chrome.send.bind(chrome, 'undo'),
   };
 
   cr.addSingletonGetter(ActionService);
 
   return {ActionService: ActionService};
 });