[DevTools] Turn links into spans to prevent default behavior.

third_party/WebKit/Source/devtools/front_end/elements/ElementsTreeElement.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 1193 matching lines @@
     function linkifyValue(value) {
       var rewrittenHref = node.resolveURL(value);
       if (rewrittenHref === null) {
         var span = createElement('span');
         setValueWithEntities.call(this, span, value);
         return span;
       }
       value = value.replace(closingPunctuationRegex, '$&\u200B');
       if (value.startsWith('data:'))
         value = value.trimMiddle(60);
-      return node.nodeName().toLowerCase() === 'a' ?
+      var link = node.nodeName().toLowerCase() === 'a' ?
           UI.createExternalLink(rewrittenHref, value, '', true) :
           Components.Linkifier.linkifyURL(rewrittenHref, value, '', undefined, undefined, true);
+      link[Elements.ElementsTreeElement.HrefSymbol] = rewrittenHref;
+      return link;
     }
 
     if (node && (name === 'src' || name === 'href')) {
       attrValueElement.appendChild(linkifyValue.call(this, value));
     } else if (
         node && (node.nodeName().toLowerCase() === 'img' || node.nodeName().toLowerCase() === 'source') &&
         name === 'srcset') {
       var sources = value.split(',');
       for (var i = 0; i < sources.length; ++i) {
         if (i > 0)
@@ skipping 322 matching lines @@
 
     this._node.resolveToObject('', scrollIntoViewCallback);
   }
 
   _editAsHTML() {
     var promise = Common.Revealer.revealPromise(this.node());
     promise.then(() => UI.actionRegistry.action('elements.edit-as-html').execute());
   }
 };
 
+Elements.ElementsTreeElement.HrefSymbol = Symbol('ElementsTreeElement.Href');
+
 Elements.ElementsTreeElement.InitialChildrenLimit = 500;
 
 // A union of HTML4 and HTML5-Draft elements that explicitly
 // or implicitly (for HTML5) forbid the closing tag.
 Elements.ElementsTreeElement.ForbiddenClosingTagElements = new Set([
   'area', 'base',  'basefont', 'br',   'canvas',   'col',  'command', 'embed',  'frame', 'hr',
   'img',  'input', 'keygen',   'link', 'menuitem', 'meta', 'param',   'source', 'track', 'wbr'
 ]);
 
 // These tags we do not allow editing their tag name.
 Elements.ElementsTreeElement.EditTagBlacklist = new Set(['html', 'head', 'body']);