Provides an API to cope with table headers in Accessibility

Source/modules/accessibility/AXTable.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 450 matching lines @@
 
     unsigned colCount = m_columns.size();
     for (unsigned k = 0; k < colCount; ++k) {
         AXObject* header = toAXTableColumn(m_columns[k].get())->headerObject();
         if (!header)
             continue;
         headers.append(header);
     }
 }
 
+void AXTable::rowHeaders(AccessibilityChildrenVector& headers)
+{
+    if (!m_renderer)
+        return;
+
+    updateChildrenIfNecessary();
+
+    unsigned rowCount = m_rows.size();
+    for (unsigned r = 0; r < rowCount; r++) {
+        if (AXObject* header = toAXTableRow(m_rows[r].get())->headerObject())
+            headers.append(header);
+    }
+}
+
 void AXTable::cells(AXObject::AccessibilityChildrenVector& cells)
 {
     if (!m_renderer)
         return;
 
     updateChildrenIfNecessary();
 
     int numRows = m_rows.size();
     for (int row = 0; row < numRows; ++row) {
         AccessibilityChildrenVector rowChildren = m_rows[row]->children();
@@ skipping 89 matching lines @@
     }
 
     // try the standard
     if (title.isEmpty())
         title = AXRenderObject::title();
 
     return title;
 }
 
 } // namespace blink