AXRoleDescriptions are not correctly exposed for dl, dd, dt tags

ui/accessibility/platform/ax_platform_node_mac.mm

 // Copyright 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.
 
 #import "ui/accessibility/platform/ax_platform_node_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/strings/sys_string_conversions.h"
 #import "ui/accessibility/platform/ax_platform_node_delegate.h"
@@ skipping 135 matching lines @@
     role_map[roles[i].value] = roles[i].nativeValue;
   return role_map;
 }
 
 RoleMap BuildSubroleMap() {
   const MapEntry subroles[] = {
       {ui::AX_ROLE_ALERT, @"AXApplicationAlert"},
       {ui::AX_ROLE_ALERT_DIALOG, @"AXApplicationAlertDialog"},
       {ui::AX_ROLE_ARTICLE, @"AXDocumentArticle"},
       {ui::AX_ROLE_DEFINITION, @"AXDefinition"},
-      {ui::AX_ROLE_DESCRIPTION_LIST_DETAIL, @"AXDescription"},
+      {ui::AX_ROLE_DESCRIPTION_LIST_DETAIL, @"AXDefinition"},
       {ui::AX_ROLE_DESCRIPTION_LIST_TERM, @"AXTerm"},
       {ui::AX_ROLE_DIALOG, @"AXApplicationDialog"},
       {ui::AX_ROLE_DOCUMENT, @"AXDocument"},
       {ui::AX_ROLE_FOOTER, @"AXLandmarkContentInfo"},
       {ui::AX_ROLE_APPLICATION, @"AXLandmarkApplication"},
       {ui::AX_ROLE_BANNER, @"AXLandmarkBanner"},
       {ui::AX_ROLE_COMPLEMENTARY, @"AXLandmarkComplementary"},
       {ui::AX_ROLE_CONTENT_INFO, @"AXLandmarkContentInfo"},
       {ui::AX_ROLE_MAIN, @"AXLandmarkMain"},
       {ui::AX_ROLE_NAVIGATION, @"AXLandmarkNavigation"},
@@ skipping 145 matching lines @@
   delete this;
 }
 
 gfx::NativeViewAccessible AXPlatformNodeMac::GetNativeViewAccessible() {
   if (!native_node_)
     native_node_.reset([[AXPlatformNodeCocoa alloc] initWithNode:this]);
   return native_node_.get();
 }
 
 }  // namespace ui