[MD settings] closure compilation

chrome/browser/resources/settings/search_engines_page/search_engine_dialog.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.
 
 /**
  * @fileoverview 'settings-search-engine-dialog' is a component for adding
  * or editing a search engine entry.
  */
 Polymer({
   is: 'settings-search-engine-dialog',
@@ skipping 15 matching lines @@
     /** @private {string} */
     queryUrl_: String,
 
     /** @private {string} */
     dialogTitle_: String,
 
     /** @private {string} */
     actionButtonText_: String,
   },
 
-  /** @private {!settings.SearchEnginesBrowserProxy} */
+  /** @private {settings.SearchEnginesBrowserProxy} */
   browserProxy_: null,
 
   /**
    * The |modelIndex| to use when a new search engine is added. Must match with
    * kNewSearchEngineIndex constant specified at
    * chrome/browser/ui/webui/settings/search_engines_handler.cc
    * @const {number}
    */
   DEFAULT_MODEL_INDEX: -1,
 
@@ skipping 61 matching lines @@
   /** @private */
   updateActionButtonState_: function() {
     var allValid = [
       this.$.searchEngine, this.$.keyword, this.$.queryUrl
     ].every(function(inputElement) {
       return !inputElement.invalid && inputElement.value.length != 0;
     });
     this.$.actionButton.disabled = !allValid;
   },
 });