diff -r 000000000000 -r 6474c204b198 layout/generic/nsGridContainerFrame.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/generic/nsGridContainerFrame.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+
+/* This Source Code is subject to the terms of the Mozilla Public License
+ * version 2.0 (the "License"). You can obtain a copy of the License at
+ * http://mozilla.org/MPL/2.0/. */
+
+/* rendering object for CSS "display: grid" */
+
+#ifndef nsGridContainerFrame_h___
+#define nsGridContainerFrame_h___
+
+#include "nsContainerFrame.h"
+
+nsIFrame* NS_NewGridContainerFrame(nsIPresShell* aPresShell,
+                                   nsStyleContext* aContext);
+
+typedef nsContainerFrame nsGridContainerFrameSuper;
+
+class nsGridContainerFrame : public nsGridContainerFrameSuper {
+
+  NS_DECL_FRAMEARENA_HELPERS
+  NS_DECL_QUERYFRAME_TARGET(nsGridContainerFrame)
+  NS_DECL_QUERYFRAME
+
+  // Factory method:
+  friend nsIFrame* NS_NewGridContainerFrame(nsIPresShell* aPresShell,
+                                            nsStyleContext* aContext);
+
+public:
+  // nsIFrame overrides
+  virtual nsIAtom* GetType() const MOZ_OVERRIDE;
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
+#endif
+
+protected:
+  // Protected constructor & destructor
+  nsGridContainerFrame(nsStyleContext* aContext) : nsGridContainerFrameSuper(aContext) {}
+  virtual ~nsGridContainerFrame();
+};
+
+#endif /* nsGridContainerFrame_h___ */