ARIA state/property(aria-relevant,aria-busy) are not exposed correctly on MAC.

content/browser/accessibility/browser_accessibility_win.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/accessibility/browser_accessibility_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include "base/strings/string_number_conversions.h"
@@ skipping 2923 matching lines @@
       ia2_role_ == IA2_ROLE_CHECK_MENU_ITEM ||
       ia2_role_ == IA2_ROLE_RADIO_MENU_ITEM ||
       ia2_role_ == IA2_ROLE_TOGGLE_BUTTON) {
     ia2_attributes_.push_back(L"checkable:true");
   }
 
   // Expose live region attributes.
   StringAttributeToIA2(ui::AX_ATTR_LIVE_STATUS, "live");
   StringAttributeToIA2(ui::AX_ATTR_LIVE_RELEVANT, "relevant");
   BoolAttributeToIA2(ui::AX_ATTR_LIVE_ATOMIC, "atomic");
-  BoolAttributeToIA2(ui::AX_ATTR_LIVE_BUSY, "busy");
 
   // Expose container live region attributes.
   StringAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_STATUS,
                        "container-live");
   StringAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_RELEVANT,
                        "container-relevant");
   BoolAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_ATOMIC,
                      "container-atomic");
-  BoolAttributeToIA2(ui::AX_ATTR_CONTAINER_LIVE_BUSY,
-                     "container-busy");
 
   // Expose slider value.
   if (ia_role_ == ROLE_SYSTEM_PROGRESSBAR ||
       ia_role_ == ROLE_SYSTEM_SCROLLBAR ||
       ia_role_ == ROLE_SYSTEM_SLIDER) {
     ia2_attributes_.push_back(L"valuetext:" + GetValueText());
   }
 
   // Expose table cell index.
   if (ia_role_ == ROLE_SYSTEM_CELL) {
@@ skipping 888 matching lines @@
   // The role should always be set.
   DCHECK(!role_name_.empty() || ia_role_);
 
   // If we didn't explicitly set the IAccessible2 role, make it the same
   // as the MSAA role.
   if (!ia2_role_)
     ia2_role_ = ia_role_;
 }
 
 }  // namespace content