Adds AX role for abbr tag.

third_party/WebKit/Source/modules/accessibility/AXNodeObject.cpp

 /*
  * Copyright (C) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 412 matching lines @@
 
     if (node()->nodeName() == "math")
         return MathRole;
 
     if (node()->hasTagName(rpTag) || node()->hasTagName(rtTag))
         return AnnotationRole;
 
     if (isHTMLFormElement(*node()))
         return FormRole;
 
+    if (node()->hasTagName(abbrTag))
+        return AbbrRole;
+
     if (node()->hasTagName(articleTag))
         return ArticleRole;
 
     if (node()->hasTagName(mainTag))
         return MainRole;
 
     if (node()->hasTagName(markTag))
         return MarkRole;
 
     if (node()->hasTagName(navTag))
@@ skipping 2295 matching lines @@
     return placeholder;
 }
 
 DEFINE_TRACE(AXNodeObject)
 {
     visitor->trace(m_node);
     AXObject::trace(visitor);
 }
 
 } // namespace blin