DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/common/OutputStream.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.
 /**
  * @interface
  */
 Common.OutputStream = function() {};
 
 Common.OutputStream.prototype = {
   /**
    * @param {string} data
    * @param {function(!Common.OutputStream)=} callback
    */
-  write: function(data, callback) {},
+  write(data, callback) {},
 
-  close: function() {}
+  close() {}
 };
 
 /**
  * @implements {Common.OutputStream}
  * @unrestricted
  */
 Common.StringOutputStream = class {
   constructor() {
     this._data = '';
   }
@@ skipping 13 matching lines @@
   close() {
   }
 
   /**
    * @return {string}
    */
   data() {
     return this._data;
   }
 };