Add grid/flex layout support for <fieldset>

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 503 matching lines @@
 
     if (getNode()->nodeName() == "TIME")
         return TimeRole;
 
     if (isEmbeddedObject())
         return EmbeddedObjectRole;
 
     if (isHTMLHRElement(*getNode()))
         return SplitterRole;
 
+    if (isFieldset()) {
+        return GroupRole;
+    }
+
     return UnknownRole;
 }
 
 AccessibilityRole AXNodeObject::determineAccessibilityRole()
 {
     if (!getNode())
         return UnknownRole;
 
     if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
         return m_ariaRole;
@@ skipping 2306 matching lines @@
     return placeholder;
 }
 
 DEFINE_TRACE(AXNodeObject)
 {
     visitor->trace(m_node);
     AXObject::trace(visitor);
 }
 
 } // namespace blink