[DevTools] Accessibility: Show siblings and children of selected node

third_party/WebKit/Source/devtools/front_end/accessibility/accessibilityNode.css

 /*
  * Copyright 2015 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.
  */
 
 .sidebar-pane.accessibility-computed {
     background-color: rgba(0, 0, 0, 0.03);
 }
 
@@ skipping 45 matching lines @@
 .ax-ignored-info {
     padding: 6px;
 }
 
 .ax-ignored-node-pane {
     flex: none;
 }
 
 .ax-tree-ignored-node {
     font-style: italic;
+    opacity: 0.7;
 }
 
 .tree-outline li {
     padding-left: 1px;
     align-items: baseline;
 }
 
 .tree-outline li.property {
     color: rgb(33, 33, 33);
 }
 
 .tree-outline li.invalid {
     position: relative;
     left: -2px;
 }
 
+.tree-outline li.inspected::after {
+    -webkit-mask-image: url(Images/smallIcons.png);
+    -webkit-mask-size: 190px 30px;
+    -webkit-mask-position: -180px 0;
+    background-color: rgb(74, 139, 238);
+    content: "";
+    position: relative;
+    left: 4px;
+    top: 1px;
+    width: 10px;
+    height: 10px;
+    transform: rotate(180deg);
+}
+
+.tree-outline:focus li.inspected.selected::after {
+    background-color: white;
+}
+
+.tree-outline li.selected .selection {
+    background-color: inherit;
+}
+
+.tree-outline li.no-dom-node {
+    opacity: 0.5;
+}
+
+.tree-outline li.children-unloaded::before {
+    opacity: 0.2;
+}
+
+.tree-outline li.partially-expanded::before {
+    -webkit-mask-position: -19px -108px;
+}
+
 .invalid {
     text-decoration: line-through;
 }
 
 .tree-outline label[is=dt-icon-label] {
     position: relative;
     left: -11px;
 }
 
 span.ax-value-undefined {
@@ skipping 13 matching lines @@
     margin-left: -11px;
 }
 
 .ax-value-string {
     color: rgb(200, 0, 0);
 }
 
 .sidebar-pane-stack .sidebar-pane {
     padding-left: 4px;
 }
+
+button.expand-siblings {
+    border-radius: 1px;
+    background-color: #f3f3f3;
+    border: 1px solid #ddd;
+    margin-left: 5px;
+    margin-bottom: 1px;
+    font-size: 11px;
+}
+
+li.siblings-expanded button.expand-siblings {
+    display: none;
+}
+
+.tree-outline li:hover .inspect-dom-node {
+    display: initial;
+}
+
+.tree-outline li.no-dom-node:hover .inspect-dom-node,
+.tree-outline li.inspected:hover .inspect-dom-node {
+    display: none;
+}
+
+button.inspect-dom-node {
+    -webkit-mask-image: url(Images/toolbarButtonGlyphs.png);
+    -webkit-mask-position: -10px -127px;
+    background-color: #5a5a5a;
+    width: 11px;
+    height: 11px;
+    padding: 0;
+    margin-left: 5px;
+    border: 0;
+    display: none;
+    position: relative;
+    top: 2px;
+}
+
+.tree-outline:focus li.selected button.inspect-dom-node {
+    background-color: white;
+}