DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/components/DOMPresentationUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 604 matching lines @@
 /**
  * @interface
  */
 Components.DOMPresentationUtils.MarkerDecorator = function() {};
 
 Components.DOMPresentationUtils.MarkerDecorator.prototype = {
   /**
    * @param {!SDK.DOMNode} node
    * @return {?{title: string, color: string}}
    */
-  decorate: function(node) {}
+  decorate(node) {}
 };
 
 /**
  * @implements {Components.DOMPresentationUtils.MarkerDecorator}
  * @unrestricted
  */
 Components.DOMPresentationUtils.GenericDecorator = class {
   /**
    * @param {!Runtime.Extension} extension
    */
   constructor(extension) {
     this._title = Common.UIString(extension.title());
     this._color = extension.descriptor()['color'];
   }
 
   /**
    * @override
    * @param {!SDK.DOMNode} node
    * @return {?{title: string, color: string}}
    */
   decorate(node) {
     return {title: this._title, color: this._color};
   }
 };