DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/ui/ActionRegistry.js

 // Copyright 2014 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.
 /**
  * @unrestricted
  */
 UI.ActionRegistry = class {
   constructor() {
     /** @type {!Map.<string, !UI.Action>} */
     this._actionsById = new Map();
@@ skipping 191 matching lines @@
  * @interface
  */
 UI.ActionDelegate = function() {};
 
 UI.ActionDelegate.prototype = {
   /**
    * @param {!UI.Context} context
    * @param {string} actionId
    * @return {boolean}
    */
-  handleAction: function(context, actionId) {}
+  handleAction(context, actionId) {}
 };
 
 /** @type {!UI.ActionRegistry} */
 UI.actionRegistry;