WebUI: cr-search-field: Remove delegation pattern, use simple event instead.

chrome/browser/resources/md_extensions/toolbar.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('extensions', function() {
   var Toolbar = Polymer({
     is: 'extensions-toolbar',

[Dan Beam, 2016/06/14 22:13:29]

i wonder what the point of keeping this as a custom element is now?

[dpapad, 2016/06/14 22:28:16]

Don't see a point in keeping this custom element anymore. I prefer to do this
cleanup separately though.

-
-    /** @param {SearchFieldDelegate} delegate */
-    setSearchDelegate: function(delegate) {
-      this.$['search-field'].setDelegate(delegate);
-    },
   });
 
   return {Toolbar: Toolbar};
 });