[DevTools] Migrate XMLView to TreeOutlineInShadow.

third_party/WebKit/Source/devtools/front_end/network/xmlView.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.
  */
 
 .shadow-xml-view {
     -webkit-user-select: text;
     overflow: auto;
     padding: 2px 4px;
 }
-
-.shadow-xml-view ol {
-    list-style: none;
-    padding: 0;
-    margin: 0;
-    -webkit-padding-start: 16px;/* step width + arrow width */
-}
-
-.shadow-xml-view > ol {
-    -webkit-padding-start: 0;
-}
-
-.shadow-xml-view ol.children:not(.expanded) {
-    display: none;
-}
-
-.shadow-xml-view li.parent::before {
-    -webkit-user-select: none;
-    -webkit-mask-image: url(Images/toolbarButtonGlyphs.png);
-    -webkit-mask-size: 352px 168px;
-    -webkit-mask-position: -4px -97px;
-    background-color: rgb(110, 110, 110);
-    content: " ";
-    width: 10px;/* arrow width */
-    height: 10px;
-    display: inline-block;
-    position: relative;
-    top: 2px;
-}
-
-.shadow-xml-view li.parent.expanded::before {
-  -webkit-mask-position: -20px -97px;
-}
-
-@media (-webkit-min-device-pixel-ratio: 1.1) {
-.shadow-xml-view li.parent::before {
-    -webkit-mask-image: url(Images/toolbarButtonGlyphs_2x.png);
-}
-} /* media */
-
-.shadow-xml-view li:not(.parent) {
-    margin-left: 10px; /* arrow width */
-}
-
-.shadow-xml-view li.shadow-xml-view-close-tag {
-    margin-left: -6px; /* step width */
-}
-
-.shadow-xml-view-tag {
-    color: rgb(136, 18, 128);
-}
-
-.shadow-xml-view-comment {
-    color: rgb(35, 110, 37);
-}
-
-.shadow-xml-view-processing-instruction {
-    color: rgb(35, 110, 37);
-}
-
-.shadow-xml-view-attribute-name {
-    color: rgb(153, 69, 0);
-}
-
-.shadow-xml-view-attribute-value {
-    color: rgb(26, 26, 166);
-}
-
-.shadow-xml-view-text {
-    color: rgb(0, 0, 0);
-    white-space: pre;
-}
-
-.shadow-xml-view-cdata {
-    color: rgb(0, 0, 0);
-}