HTML article tag should have AXRoleDescription as 'article'

content/browser/accessibility/browser_accessibility_cocoa.mm

 // 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 <execinfo.h>
 
 #import "content/browser/accessibility/browser_accessibility_cocoa.h"
 
 #include <map>
 
@@ skipping 557 matching lines @@
       if ((internalRole != ui::AX_ROLE_GROUP &&
            internalRole != ui::AX_ROLE_LIST_ITEM) ||
           internalRole == ui::AX_ROLE_TAB) {
         // TODO(dtseng): This is not localized; see crbug/84814.
         return base::SysUTF8ToNSString(role);
       }
     }
   }
 
   switch([self internalRole]) {
+  case ui::AX_ROLE_ARTICLE:
+    return base::SysUTF16ToNSString(content_client->GetLocalizedString(
+        IDS_AX_ROLE_ARTICLE));
+    break;
   case ui::AX_ROLE_BANNER:
     return base::SysUTF16ToNSString(content_client->GetLocalizedString(
         IDS_AX_ROLE_BANNER));
     break;
   case ui::AX_ROLE_FOOTER:
     return base::SysUTF16ToNSString(content_client->GetLocalizedString(
         IDS_AX_ROLE_FOOTER));
   case ui::AX_ROLE_REGION:
     return base::SysUTF16ToNSString(content_client->GetLocalizedString(
         IDS_AX_ROLE_REGION));
@@ skipping 865 matching lines @@
     return [super hash];
   return browserAccessibility_->GetId();
 }
 
 - (BOOL)accessibilityShouldUseUniqueId {
   return YES;
 }
 
 @end