diff -r 000000000000 -r 6474c204b198 dom/xslt/xpath/XPathEvaluator.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xslt/xpath/XPathEvaluator.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,75 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_XPathEvaluator_h
+#define mozilla_dom_XPathEvaluator_h
+
+#include "nsIDOMXPathEvaluator.h"
+#include "nsIWeakReference.h"
+#include "nsAutoPtr.h"
+#include "nsString.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "nsIDocument.h"
+
+class nsINode;
+class txResultRecycler;
+
+namespace mozilla {
+namespace dom {
+
+class GlobalObject;
+
+/**
+ * A class for evaluating an XPath expression string
+ */
+class XPathEvaluator MOZ_FINAL : public nsIDOMXPathEvaluator
+{
+public:
+    XPathEvaluator(nsIDocument* aDocument = nullptr);
+
+    NS_DECL_ISUPPORTS
+
+    // nsIDOMXPathEvaluator interface
+    NS_DECL_NSIDOMXPATHEVALUATOR
+
+    // WebIDL API
+    JSObject* WrapObject(JSContext* aCx);
+    nsIDocument* GetParentObject()
+    {
+        nsCOMPtr<nsIDocument> doc = do_QueryReferent(mDocument);
+        return doc;
+    }
+    static already_AddRefed<XPathEvaluator>
+        Constructor(const GlobalObject& aGlobal, ErrorResult& rv);
+    already_AddRefed<nsIDOMXPathExpression>
+        CreateExpression(const nsAString& aExpression,
+                         nsIDOMXPathNSResolver* aResolver,
+                         ErrorResult& rv);
+    already_AddRefed<nsIDOMXPathNSResolver>
+        CreateNSResolver(nsINode* aNodeResolver, ErrorResult& rv);
+    already_AddRefed<nsISupports>
+        Evaluate(const nsAString& aExpression, nsINode* aContextNode,
+                 nsIDOMXPathNSResolver* aResolver, uint16_t aType,
+                 nsISupports* aResult, ErrorResult& rv);
+private:
+    nsWeakPtr mDocument;
+    nsRefPtr<txResultRecycler> mRecycler;
+};
+
+inline nsISupports*
+ToSupports(XPathEvaluator* e)
+{
+    return static_cast<nsIDOMXPathEvaluator*>(e);
+}
+
+/* d0a75e02-b5e7-11d5-a7f2-df109fb8a1fc */
+#define TRANSFORMIIX_XPATH_EVALUATOR_CID   \
+{ 0xd0a75e02, 0xb5e7, 0x11d5, { 0xa7, 0xf2, 0xdf, 0x10, 0x9f, 0xb8, 0xa1, 0xfc } }
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_XPathEvaluator_h */