DevTools: use shorthand syntax in interface definitions.

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

 /*
  * Copyright (C) 2009 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 714 matching lines @@
 
 /**
  * @interface
  */
 UI.ToolbarItem.Provider = function() {};
 
 UI.ToolbarItem.Provider.prototype = {
   /**
    * @return {?UI.ToolbarItem}
    */
-  item: function() {}
+  item() {}
 };
 
 /**
  * @interface
  */
 UI.ToolbarItem.ItemsProvider = function() {};
 
 UI.ToolbarItem.ItemsProvider.prototype = {
   /**
    * @return {!Array<!UI.ToolbarItem>}
    */
-  toolbarItems: function() {}
+  toolbarItems() {}
 };
 
 /**
  * @unrestricted
  */
 UI.ToolbarComboBox = class extends UI.ToolbarItem {
   /**
    * @param {?function(!Event)} changeHandler
    * @param {string=} className
    */
@@ skipping 138 matching lines @@
     return this.inputElement.checked;
   }
 
   /**
    * @param {boolean} value
    */
   setChecked(value) {
     this.inputElement.checked = value;
   }
 };