Add conversion rule for WebAXRoleDescriptionList

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 23 matching lines @@
       {ui::AX_ROLE_CELL, @"AXCell"},
       {ui::AX_ROLE_CHECK_BOX, NSAccessibilityCheckBoxRole},
       {ui::AX_ROLE_COLOR_WELL, NSAccessibilityColorWellRole},
       {ui::AX_ROLE_COLUMN, NSAccessibilityColumnRole},
       {ui::AX_ROLE_COLUMN_HEADER, @"AXCell"},
       {ui::AX_ROLE_COMBO_BOX, NSAccessibilityComboBoxRole},
       {ui::AX_ROLE_COMPLEMENTARY, NSAccessibilityGroupRole},
       {ui::AX_ROLE_CONTENT_INFO, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DEFINITION, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DESCRIPTION_LIST_DETAIL, NSAccessibilityGroupRole},
+      {ui::AX_ROLE_DESCRIPTION_LIST, NSAccessibilityListRole},
       {ui::AX_ROLE_DESCRIPTION_LIST_TERM, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DIALOG, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DETAILS, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DIRECTORY, NSAccessibilityListRole},
       {ui::AX_ROLE_DISCLOSURE_TRIANGLE, NSAccessibilityDisclosureTriangleRole},
       {ui::AX_ROLE_DIV, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DOCUMENT, NSAccessibilityGroupRole},
       {ui::AX_ROLE_DRAWER, NSAccessibilityDrawerRole},
       {ui::AX_ROLE_EDITABLE_TEXT, NSAccessibilityTextFieldRole},
       {ui::AX_ROLE_FIGCAPTION, NSAccessibilityGroupRole},
@@ skipping 252 matching lines @@
   delete this;
 }
 
 gfx::NativeViewAccessible AXPlatformNodeMac::GetNativeViewAccessible() {
   if (!native_node_)
     native_node_.reset([[AXPlatformNodeCocoa alloc] initWithNode:this]);
   return native_node_.get();
 }
 
 }  // namespace ui