diff -r 000000000000 -r 6474c204b198 layout/xul/nsBoxObject.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/xul/nsBoxObject.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* -*- 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 nsBoxObject_h_
+#define nsBoxObject_h_
+
+#include "mozilla/Attributes.h"
+#include "nsCOMPtr.h"
+#include "nsIBoxObject.h"
+#include "nsPIBoxObject.h"
+#include "nsPoint.h"
+#include "nsAutoPtr.h"
+#include "nsHashKeys.h"
+#include "nsInterfaceHashtable.h"
+#include "nsCycleCollectionParticipant.h"
+
+class nsIFrame;
+class nsIDocShell;
+struct nsIntRect;
+class nsIPresShell;
+
+class nsBoxObject : public nsPIBoxObject
+{
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(nsBoxObject)
+  NS_DECL_NSIBOXOBJECT
+
+public:
+  nsBoxObject();
+  virtual ~nsBoxObject();
+
+  // nsPIBoxObject
+  virtual nsresult Init(nsIContent* aContent) MOZ_OVERRIDE;
+  virtual void Clear() MOZ_OVERRIDE;
+  virtual void ClearCachedValues() MOZ_OVERRIDE;
+
+  nsIFrame* GetFrame(bool aFlushLayout);
+  nsIPresShell* GetPresShell(bool aFlushLayout);
+  nsresult GetOffsetRect(nsIntRect& aRect);
+  nsresult GetScreenPosition(nsIntPoint& aPoint);
+
+  // Given a parent frame and a child frame, find the frame whose
+  // next sibling is the given child frame and return its element
+  static nsresult GetPreviousSibling(nsIFrame* aParentFrame, nsIFrame* aFrame,
+                                     nsIDOMElement** aResult);
+
+protected:
+
+  nsAutoPtr<nsInterfaceHashtable<nsStringHashKey,nsISupports> > mPropertyTable; //[OWNER]
+
+  nsIContent* mContent; // [WEAK]
+};
+
+#endif