[DevTools] Cleanup DOMExtension.js.

third_party/WebKit/Source/devtools/front_end/components/DOMPresentationUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 119 matching lines @@
  * @param {!WebInspector.DeferredDOMNode} deferredNode
  * @return {!Node}
  */
 WebInspector.DOMPresentationUtils.linkifyDeferredNodeReference = function(deferredNode)
 {
     var root = createElement("div");
     var shadowRoot = WebInspector.createShadowRootWithCoreStyles(root, "components/domUtils.css");
     var link = shadowRoot.createChild("div", "node-link");
     link.createChild("content");
     link.addEventListener("click", deferredNode.resolve.bind(deferredNode, onDeferredNodeResolved), false);
-    link.addEventListener("mousedown", consumeEvent, false);
+    link.addEventListener("mousedown", (e) => e.consume(), false);
 
     /**
      * @param {?WebInspector.DOMNode} node
      */
     function onDeferredNodeResolved(node)
     {
         WebInspector.Revealer.reveal(node);
     }
 
     return root;
@@ skipping 509 matching lines @@
     /**
      * @override
      * @param {!WebInspector.DOMNode} node
      * @return {?{title: string, color: string}}
      */
     decorate: function(node)
     {
         return { title: this._title, color: this._color };
     }
 }