Relation properties for Accessibility Object Model phase 1

third_party/WebKit/Source/core/dom/AccessibleNode.idl

 // Copyright 2017 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.
 
 // Accessibility Object Model node
 // Explainer: https://github.com/WICG/aom/blob/master/explainer.md
 // Spec: https://wicg.github.io/aom/spec/
 [
     RuntimeEnabled=AccessibilityObjectModel
 ] interface AccessibleNode {
+    attribute AccessibleNode? activeDescendant;
     attribute boolean? atomic;
     attribute DOMString? autocomplete;
     attribute boolean? busy;
     attribute DOMString? checked;
     attribute long? colCount;
     attribute unsigned long? colIndex;
     attribute unsigned long? colSpan;
     attribute DOMString? current;
+    attribute AccessibleNode? details;
     attribute boolean? disabled;
+    attribute AccessibleNode? errorMessage;
     attribute boolean? expanded;
     attribute boolean? hidden;
     attribute DOMString? invalid;
     attribute DOMString? keyShortcuts;
     attribute DOMString? label;
     attribute unsigned long? level;
     attribute DOMString? live;
     attribute boolean? modal;
     attribute boolean? multiline;
     attribute boolean? multiselectable;
@@ skipping 10 matching lines @@
     attribute unsigned long? rowIndex;
     attribute unsigned long? rowSpan;
     attribute boolean? selected;
     attribute long? setSize;
     attribute DOMString? sort;
     attribute double? valueMax;
     attribute double? valueMin;
     attribute double? valueNow;
     attribute DOMString? valueText;
 };