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

Source/devtools/front_end/elements/ElementsTreeOutline.js

 /*
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 597 matching lines @@
         }
 
         if (element && element._node)
             this._domModel.highlightDOMNodeWithConfig(element._node.id, { mode: "all", showInfo: !WebInspector.KeyboardShortcut.eventHasCtrlOrMeta(event) });
         else
             this._domModel.hideDOMNodeHighlight();
     },
 
     _onmouseout: function(event)
     {
-        var nodeUnderMouse = event.elementFromPoint();
+        var nodeUnderMouse = event.deepElementFromPoint();
         if (nodeUnderMouse && nodeUnderMouse.isDescendant(this._element))
             return;
 
         if (this._previousHoveredElement) {
             this._previousHoveredElement.hovered = false;
             delete this._previousHoveredElement;
         }
 
         this._domModel.hideDOMNodeHighlight();
     },
@@ skipping 1661 matching lines @@
         {
             var rewrittenHref = node.resolveURL(value);
             if (rewrittenHref === null) {
                 var span = document.createElement("span");
                 setValueWithEntities.call(this, span, value);
                 return span;
             }
             value = value.replace(closingPunctuationRegex, "$&\u200B");
             if (value.startsWith("data:"))
                 value = value.trimMiddle(60);
-            return linkify(rewrittenHref, value, "", node.nodeName().toLowerCase() === "a");
+            var anchor = linkify(rewrittenHref, value, "", node.nodeName().toLowerCase() === "a");
+            anchor.preventFollow = true;
+            return anchor;
         }
 
         if (linkify && (name === "src" || name === "href")) {
             attrValueElement.appendChild(linkifyValue.call(this, value));
         } else if (linkify && node.nodeName().toLowerCase() === "img" && name === "srcset") {
             var sources = value.split(",");
             for (var i = 0; i < sources.length; ++i) {
                 if (i > 0)
                     attrValueElement.createTextChild(", ");
                 var source = sources[i].trim();
@@ skipping 639 matching lines @@
                 treeOutline.rootDOMNode = node;
                 if (!treeOutline.children[0].hasChildren)
                     treeOutline._element.classList.add("single-node");
                 treeOutline.setVisible(true);
                 treeOutline.element.treeElementForTest = treeOutline.children[0];
                 resolve(treeOutline.element);
             }
         }
     }
 }