[DevTools] Cleanup DOMExtension.js.

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

 // Copyright (c) 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.
 
 /**
  * @constructor
  * @extends {HTMLInputElement}
  */
 WebInspector.HistoryInput = function()
 {
@@ skipping 29 matching lines @@
     },
 
     /**
      * @param {!Event} event
      */
     _onKeyDown: function(event)
     {
         if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Up.code) {
             this._historyPosition = Math.max(this._historyPosition - 1, 0);
             this.value = this._history[this._historyPosition];
-            this.dispatchEvent(createEvent("input", true, true));
+            this.dispatchEvent(new Event("input", {"bubbles": true, "cancelable": true}));
             event.consume(true);
         } else if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Down.code) {
             this._historyPosition = Math.min(this._historyPosition + 1, this._history.length - 1);
             this.value = this._history[this._historyPosition];
-            this.dispatchEvent(createEvent("input", true, true));
+            this.dispatchEvent(new Event("input", {"bubbles": true, "cancelable": true}));
             event.consume(true);
         } else if (event.keyCode === WebInspector.KeyboardShortcut.Keys.Enter.code) {
             this._saveToHistory();
         }
     },
 
     _saveToHistory: function()
     {
         if (this._history.length > 1 && this._history[this._history.length - 2] === this.value)
             return;
         this._history[this._history.length - 1] = this.value;
         this._historyPosition = this._history.length - 1;
         this._history.push("");
     },
 
     __proto__: HTMLInputElement.prototype
 }