[DevTools] Extracted EventListenersTreeOutline

Source/devtools/front_end/elements/elementsPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * 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
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 442 matching lines @@
 }
 
 .animations-controls > .playback-label {
     width: 35px;
 }
 
 .styles-selector {
     cursor: text;
 }
 
-.event-listener-tree li {
-    padding: 2px 0 0 5px;
-}
-
-.event-listener-tree {
-    margin-top: 5px;
-}
-
-.event-listener-tree > li {
-    border-top: 1px solid rgb(231, 231, 231);
-}
-
-.event-listener-tree > li:first-of-type {
-    border-top: none;
-}
-
-.event-listener-tree {
-    padding-left: 0 !important;
-}
-
-.event-listener-tree li.parent::before {
-    top: 0 !important;
-}
-
-.event-listener-tree .name {
-    color: rgb(136, 19, 145);
-}
-
-.event-listener-tree-subtitle {
-    float: right;
-}
-
 .image-preview-container {
     background: transparent;
     text-align: center;
 }
 
 .image-preview-container img {
     margin: 2px auto;
     max-width: 100px;
     max-height: 100px;
     background-image: url(Images/checker.png);
@@ skipping 246 matching lines @@
 .style-properties li.editing-sub-part {
     padding: 3px 6px 8px 18px;
     margin: -1px -6px -8px -6px;
     text-overflow: clip;
 }
 
 .styles-pane-toolbar {
     float: right;
     margin-top: -3px;
 }