Aria table row and column headers are not exposed in accessibility

Source/modules/accessibility/AXARIAGridCell.cpp

 /*
  * Copyright (C) 2009 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 32 matching lines @@
 
 AXARIAGridCell::~AXARIAGridCell()
 {
 }
 
 PassRefPtr<AXARIAGridCell> AXARIAGridCell::create(RenderObject* renderer, AXObjectCacheImpl* axObjectCache)
 {
     return adoptRef(new AXARIAGridCell(renderer, axObjectCache));
 }
 
+bool AXARIAGridCell::isAriaColumnHeader() const
+{
+    const AtomicString& role = getAttribute(HTMLNames::roleAttr);
+    return equalIgnoringCase(role, "columnheader");
+}
+
+bool AXARIAGridCell::isAriaRowHeader() const
+{
+    const AtomicString& role = getAttribute(HTMLNames::roleAttr);
+    return equalIgnoringCase(role, "rowheader");
+}
+
 AXObject* AXARIAGridCell::parentTable() const
 {
     AXObject* parent = parentObjectUnignored();
     if (!parent)
         return 0;
 
     if (parent->isAXTable())
         return parent;
 
     // It could happen that we hadn't reached the parent table yet (in
@@ skipping 51 matching lines @@
         if (siblings[k].get() == this) {
             columnRange.first = k;
             break;
         }
     }
 
     // as far as I can tell, grid cells cannot span columns
     columnRange.second = 1;
 }
 
+AccessibilityRole AXARIAGridCell::scanToDecideHeaderRole()
+{
+    if (isAriaRowHeader())
+        return RowHeaderRole;
+
+    if (isAriaColumnHeader())
+        return ColumnHeaderRole;
+
+    return CellRole;
+}
+
 } // namespace blink