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

chrome/browser/resources/md_history/app.js

Index: chrome/browser/resources/md_history/app.js
diff --git a/chrome/browser/resources/md_history/app.js b/chrome/browser/resources/md_history/app.js
index 27070dd0c5820f73a86dab4aff8044937d981a24..eb953111821c6cae7bd0043e0b6097b8cb22702d 100644
--- a/chrome/browser/resources/md_history/app.js
+++ b/chrome/browser/resources/md_history/app.js
@@ -155,9 +155,7 @@ Polymer({
         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;