DevTools: use shorthand syntax in interface definitions.

third_party/WebKit/Source/devtools/front_end/sources/SimpleHistoryManager.js

 /*
  * Copyright (C) 2014 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 18 matching lines @@
  */
 /**
  * @interface
  */
 Sources.HistoryEntry = function() {};
 
 Sources.HistoryEntry.prototype = {
   /**
    * @return {boolean}
    */
-  valid: function() {},
+  valid() {},
 
-  reveal: function() {}
+  reveal() {}
 };
 
 /**
  * @unrestricted
  */
 Sources.SimpleHistoryManager = class {
   /**
    * @param {number} historyDepth
    */
   constructor(historyDepth) {
@@ skipping 97 matching lines @@
       return false;
 
     this.readOnlyLock();
     this._entries[revealIndex].reveal();
     this.releaseReadOnlyLock();
 
     this._activeEntryIndex = revealIndex;
     return true;
   }
 };