DevTools: use shorthand syntax in interface definitions.

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 566 matching lines @@
 /**
  * @interface
  */
 UI.ViewportControl.Provider = function() {};
 
 UI.ViewportControl.Provider.prototype = {
   /**
    * @param {number} index
    * @return {number}
    */
-  fastHeight: function(index) {
+  fastHeight(index) {
     return 0;
   },
 
   /**
    * @return {number}
    */
-  itemCount: function() {
+  itemCount() {
     return 0;
   },
 
   /**
    * @return {number}
    */
-  minimumRowHeight: function() {
+  minimumRowHeight() {
     return 0;
   },
 
   /**
    * @param {number} index
    * @return {?UI.ViewportElement}
    */
-  itemElement: function(index) {
+  itemElement(index) {
     return null;
   }
 };
 
 /**
  * @interface
  */
 UI.ViewportElement = function() {};
 UI.ViewportElement.prototype = {
-  willHide: function() {},
+  willHide() {},
 
-  wasShown: function() {},
+  wasShown() {},
 
   /**
    * @return {!Element}
    */
-  element: function() {},
+  element() {},
 };
 
 /**
  * @implements {UI.ViewportElement}
  * @unrestricted
  */
 UI.StaticViewportElement = class {
   /**
    * @param {!Element} element
    */
@@ skipping 14 matching lines @@
   }
 
   /**
    * @override
    * @return {!Element}
    */
   element() {
     return this._element;
   }
 };