Return table headers from the table cell level.

Source/web/WebAXObject.cpp

Index: Source/web/WebAXObject.cpp
diff --git a/Source/web/WebAXObject.cpp b/Source/web/WebAXObject.cpp
index 379167a740e1007fc53f20f15527151044544242..926bf4d7098e4caa3ff60ae15b49e5de331f3bff 100644
--- a/Source/web/WebAXObject.cpp
+++ b/Source/web/WebAXObject.cpp
@@ -1250,6 +1250,46 @@ WebAXSortDirection WebAXObject::sortDirection() const
     return static_cast<WebAXSortDirection>(m_private->sortDirection());
 }
 
+void WebAXObject::rowHeadersForCell(WebVector<WebAXObject>& rowHeaders) const
+{
+    if (isDetached())
+        return;
+
+    if (!m_private->isTableCell())
+        return;
+
+    AXObject::AccessibilityChildrenVector headers;
+    toAXTableCell(m_private.get())->rowHeadersForCell(headers);
+
+    size_t headerCount = headers.size();
+    WebVector<WebAXObject> result(headerCount);
+
+    for (size_t i = 0; i < headerCount; i++)
+        result[i] = WebAXObject(headers[i]);
+
+    rowHeaders.swap(result);
+}
+
+void WebAXObject::columnHeadersForCell(WebVector<WebAXObject>& columnHeaders) const
+{
+    if (isDetached())
+        return;
+
+    if (!m_private->isTableCell())
+        return;
+
+    AXObject::AccessibilityChildrenVector headers;
+    toAXTableCell(m_private.get())->columnHeadersForCell(headers);
+
+    size_t headerCount = headers.size();
+    WebVector<WebAXObject> result(headerCount);
+
+    for (size_t i = 0; i < headerCount; i++)
+        result[i] = WebAXObject(headers[i]);
+
+    columnHeaders.swap(result);
+}
+
 void WebAXObject::loadInlineTextBoxes() const
 {
     if (isDetached())