import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/mathml/nsMathMLsemanticsFrame.h

@@ -0,0 +1,31 @@
+/* -*- 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 nsMathMLsemanticsFrame_h___
+#define nsMathMLsemanticsFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsMathMLSelectedFrame.h"
+
+//
+// <semantics> -- associate annotations with a MathML expression
+//
+
+class nsMathMLsemanticsFrame : public nsMathMLSelectedFrame {
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  friend nsIFrame* NS_NewMathMLsemanticsFrame(nsIPresShell* aPresShell,
+                                              nsStyleContext* aContext);
+
+protected:
+  explicit nsMathMLsemanticsFrame(nsStyleContext* aContext) :
+    nsMathMLSelectedFrame(aContext) {}
+  virtual ~nsMathMLsemanticsFrame();
+
+  nsIFrame* GetSelectedFrame() override;
+};
+
+#endif /* nsMathMLsemanticsFrame_h___ */