HTML Ruby tag is not exposed on Windows

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 3687 matching lines @@
       } else {
         ia_role_ = ROLE_SYSTEM_PANE;
       }
       break;
     case ui::AX_ROLE_ROW:
       ia_role_ = ROLE_SYSTEM_ROW;
       break;
     case ui::AX_ROLE_ROW_HEADER:
       ia_role_ = ROLE_SYSTEM_ROWHEADER;
       break;
+    case ui::AX_ROLE_RUBY:
+      ia_role_ = ROLE_SYSTEM_TEXT;
+      ia2_role_ = IA2_ROLE_TEXT_FRAME;
+      break;
     case ui::AX_ROLE_RULER:
       ia_role_ = ROLE_SYSTEM_CLIENT;
       ia2_role_ = IA2_ROLE_RULER;
       ia_state_ |= STATE_SYSTEM_READONLY;
       break;
     case ui::AX_ROLE_SCROLL_AREA:
       ia_role_ = ROLE_SYSTEM_CLIENT;
       ia2_role_ = IA2_ROLE_SCROLL_PANE;
       ia_state_ |= STATE_SYSTEM_READONLY;
       ia2_state_ &= ~(IA2_STATE_EDITABLE);
@@ skipping 137 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