diff -r 000000000000 -r 6474c204b198 dom/xslt/xpath/txNamedAttributeStep.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xslt/xpath/txNamedAttributeStep.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,64 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIAtom.h"
+#include "txIXPathContext.h"
+#include "txNodeSet.h"
+#include "txExpr.h"
+#include "txXPathTreeWalker.h"
+
+txNamedAttributeStep::txNamedAttributeStep(int32_t aNsID,
+                                           nsIAtom* aPrefix,
+                                           nsIAtom* aLocalName)
+    : mNamespace(aNsID),
+      mPrefix(aPrefix),
+      mLocalName(aLocalName)
+{
+}
+
+nsresult
+txNamedAttributeStep::evaluate(txIEvalContext* aContext,
+                               txAExprResult** aResult)
+{
+    *aResult = nullptr;
+
+    nsRefPtr<txNodeSet> nodes;
+    nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    txXPathTreeWalker walker(aContext->getContextNode());
+    if (walker.moveToNamedAttribute(mLocalName, mNamespace)) {
+        rv = nodes->append(walker.getCurrentPosition());
+        NS_ENSURE_SUCCESS(rv, rv);
+    }
+    NS_ADDREF(*aResult = nodes);
+
+    return NS_OK;
+}
+
+TX_IMPL_EXPR_STUBS_0(txNamedAttributeStep, NODESET_RESULT)
+
+bool
+txNamedAttributeStep::isSensitiveTo(ContextSensitivity aContext)
+{
+    return !!(aContext & NODE_CONTEXT);
+}
+
+#ifdef TX_TO_STRING
+void
+txNamedAttributeStep::toString(nsAString& aDest)
+{
+    aDest.Append(char16_t('@'));
+    if (mPrefix) {
+        nsAutoString prefix;
+        mPrefix->ToString(prefix);
+        aDest.Append(prefix);
+        aDest.Append(char16_t(':'));
+    }
+    nsAutoString localName;
+    mLocalName->ToString(localName);
+    aDest.Append(localName);
+}
+#endif