Provides an API to cope with table headers in Accessibility

Source/web/WebAXObject.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1151 matching lines @@
         return 0;
 
     if (!m_private->isTableCell())
         return 0;
 
     pair<unsigned, unsigned> rowRange;
     toAXTableCell(m_private.get())->rowIndexRange(rowRange);
     return rowRange.second;
 }
 
+void WebAXObject::tableHeaders(WebVector<WebAXObject>& headerElements, bool rowHeaders) const
+{
+    if (isDetached())
+        return;
+
+    if (!m_private->isAXTable())
+        return;
+
+    AXObject::AccessibilityChildrenVector headers;
+    if (rowHeaders)
+        toAXTable(m_private.get())->rowHeaders(headers);
+    else
+        toAXTable(m_private.get())->columnHeaders(headers);
+
+    size_t headerCount = headers.size();
+    WebVector<WebAXObject> result(headerCount);
+
+    for (size_t i = 0; i < headerCount; i++)
+        result[i] = WebAXObject(headers[i]);
+
+    headerElements.swap(result);
+}
+
 void WebAXObject::loadInlineTextBoxes() const
 {
     if (isDetached())
         return;
 
     m_private->loadInlineTextBoxes();
 }
 
 WebAXTextDirection WebAXObject::textDirection() const
 {
@@ skipping 64 matching lines @@
     m_private = object;
     return *this;
 }
 
 WebAXObject::operator WTF::PassRefPtr<AXObject>() const
 {
     return m_private.get();
 }
 
 } // namespace blink