diff -r 000000000000 -r 6474c204b198 layout/generic/MathMLTextRunFactory.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/generic/MathMLTextRunFactory.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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 MATHMLTEXTRUNFACTORY_H_
+#define MATHMLTEXTRUNFACTORY_H_
+
+#include "nsTextRunTransformations.h"
+
+/**
+ * Builds textruns that render their text with MathML specific renderings.
+ */
+class MathMLTextRunFactory : public nsTransformingTextRunFactory {
+public:
+  MathMLTextRunFactory(nsTransformingTextRunFactory* aInnerTransformingTextRunFactory,
+                       uint8_t aSSTYScriptLevel)
+    : mInnerTransformingTextRunFactory(aInnerTransformingTextRunFactory),
+      mSSTYScriptLevel(aSSTYScriptLevel) {}
+
+  virtual void RebuildTextRun(nsTransformedTextRun* aTextRun,
+                              gfxContext* aRefContext) MOZ_OVERRIDE;
+protected:
+  nsAutoPtr<nsTransformingTextRunFactory> mInnerTransformingTextRunFactory;
+  uint8_t mSSTYScriptLevel;
+};
+
+#endif /*MATHMLTEXTRUNFACTORY_H_*/