MD History: Make the forward slash key to rely on focused only

chrome/browser/resources/md_history/app.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-app',
 
   properties: {
     // The id of the currently selected page.
     selectedPage_: {type: String, value: 'history', observer: 'unselectAll'},
@@ skipping 137 matching lines @@
    * @param {Event} e
    * @private
    */
   onCanExecute_: function(e) {
     e = /** @type {cr.ui.CanExecuteEvent} */(e);
     switch (e.command.id) {
       case 'find-command':
         e.canExecute = true;
         break;
       case 'slash-command':
-        e.canExecute =
-            !(this.$.toolbar.searchBar.showingSearch &&
-              this.$.toolbar.searchBar.isSearchFocused());
+        e.canExecute = !this.$.toolbar.searchBar.isSearchFocused();
         break;
       case 'delete-command':
         e.canExecute = this.$.toolbar.count > 0;
         break;
     }
   },
 
   /**
    * @param {string} searchTerm
    * @private
@@ skipping 89 matching lines @@
    * added as a child of iron-pages.
    * @param {string} selectedPage
    * @param {Array} items
    * @return {string}
    * @private
    */
   getSelectedPage_(selectedPage, items) {
     return selectedPage;
   },
 });