DevTools: make web component anchor handling go the generic route.

Source/devtools/front_end/elementsTreeOutline.css

 /*
  * Copyright (c) 2014 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.
  */
 
 .outline-disclosure {
     line-height: normal;
 }
 
@@ skipping 238 matching lines @@
     to { background-color: inherit; }
 }
 
 @-webkit-keyframes elements-tree-element-pick-node-animation-2 {
     from { background-color: rgb(255, 210, 126); }
     to { background-color: inherit; }
 }
 
 .pick-node-mode {
     cursor: pointer;
-}
+}
+
+.webkit-html-attribute-value a {
+    cursor: default !important;
+}