Table headers are not retrieved properly by Accessibility API

Source/modules/accessibility/AXTableRow.cpp

 /*
  * Copyright (C) 2008 Apple 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 108 matching lines @@
     if (!cellRenderer)
         return 0;
 
     Node* cellNode = cellRenderer->node();
     if (!cellNode || !cellNode->hasTagName(thTag))
         return 0;
 
     return cell;
 }
 
+void AXTableRow::headerObjectsForRow(AccessibilityChildrenVector& headers)
+{
+    if (!m_renderer || !m_renderer->isTableRow())
+        return;
+
+    AccessibilityChildrenVector rowChildren = children();
+    unsigned childrenCount = rowChildren.size();
+    for (unsigned i = 0; i < childrenCount; i++) {
+        AXObject* cell = rowChildren[i].get();
+        if (!cell->isTableCell())
+            continue;
+
+        if (toAXTableCell(cell)->scanToDecideHeaderRole() == RowHeaderRole)
+            headers.append(cell);
+    }
+}
+
 } // namespace blink