diff -r 000000000000 -r 6474c204b198 layout/inspector/inLayoutUtils.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/inspector/inLayoutUtils.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+/* -*- 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 __inLayoutUtils_h__
+#define __inLayoutUtils_h__
+
+class nsIDocument;
+class nsIDOMDocument;
+class nsIDOMElement;
+class nsIDOMNode;
+class nsIDOMWindow;
+class nsIFrame;
+class nsIPresShell;
+class nsISupports;
+
+namespace mozilla {
+class EventStateManager;
+}
+
+class inLayoutUtils
+{
+public:
+  static nsIDOMWindow* GetWindowFor(nsIDOMNode* aNode);
+  static nsIDOMWindow* GetWindowFor(nsIDOMDocument* aDoc);
+  static nsIPresShell* GetPresShellFor(nsISupports* aThing);
+  static nsIFrame* GetFrameFor(nsIDOMElement* aElement);
+  static mozilla::EventStateManager*
+           GetEventStateManagerFor(nsIDOMElement *aElement);
+  static nsIDOMDocument* GetSubDocumentFor(nsIDOMNode* aNode);
+  static nsIDOMNode* GetContainerFor(const nsIDocument& aDoc);
+};
+
+#endif // __inLayoutUtils_h__