Site Settings Desktop: Add Closure coverage for Protocol Handlers.

chrome/browser/resources/settings/site_settings/protocol_handlers.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
  * 'protocol-handlers' is the polymer element for showing the
  * protocol handlers category under Site Settings.
  */
 
+/**
+ * All possible actions in the menu.
+ * @enum {string}
+ */
 var MenuActions = {
   SET_DEFAULT: 'SetDefault',
   REMOVE: 'Remove',
 };
 
 /**
  * @typedef {{host: string,
  *            protocol: string,
  *            spec: string}}
  */
@@ skipping 41 matching lines @@
         this.setHandlersEnabled_.bind(this));
     this.addWebUIListener('setProtocolHandlers',
         this.setProtocolHandlers_.bind(this));
     this.addWebUIListener('setIgnoredProtocolHandlers',
         this.setIgnoredProtocolHandlers_.bind(this));
     this.browserProxy.initializeProtocolHandlerList();
   },
 
   /**
    * Obtains the description for the main toggle.
-   * @param {number} categoryEnabled Whether the main toggle is enabled.
+   * @param {boolean} categoryEnabled Whether the main toggle is enabled.
    * @return {string} The description to use.
    * @private
    */
   computeHandlersDescription_: function(categoryEnabled) {
     return this.computeCategoryDesc(
         settings.ContentSettingsTypes.PROTOCOL_HANDLERS, categoryEnabled, true);
   },
 
   /**
    * Returns whether the given index matches the default handler.
@@ skipping 38 matching lines @@
   /**
    * A handler when the toggle is flipped.
    * @private
    */
   onToggleChange_: function(event) {
     this.browserProxy.setProtocolHandlerDefault(this.categoryEnabled);
   },
 
   /**
    * A handler when an action is selected in the action menu.
+   * @param {!{model: !{item: ProtocolHandlerEntry},
+   *           detail: !{selected: string}}} event
    * @private
    */
   onActionMenuIronActivate_: function(event) {
     var protocol = event.model.item.protocol;
     var url = event.model.item.spec;
     if (event.detail.selected == MenuActions.SET_DEFAULT) {
       this.browserProxy.setProtocolDefault(protocol, url);
     } else if (event.detail.selected == MenuActions.REMOVE) {
       this.browserProxy.removeProtocolHandler(protocol, url);
     }
   },
 });