diff -r 000000000000 -r 6474c204b198 layout/printing/nsPrintPreviewListener.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/printing/nsPrintPreviewListener.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 4; 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 nsPrintPreviewListener_h__
+#define nsPrintPreviewListener_h__
+
+// Interfaces needed to be included
+#include "nsIDOMEventListener.h"
+// Helper Classes
+#include "nsCOMPtr.h"
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+namespace dom {
+class EventTarget;
+}
+}
+
+//
+// class nsPrintPreviewListener
+//
+// The class that listens to the chrome events and tells the embedding
+// chrome to show context menus, as appropriate. Handles registering itself
+// with the DOM with AddChromeListeners() and removing itself with
+// RemoveChromeListeners().
+//
+class nsPrintPreviewListener MOZ_FINAL : public nsIDOMEventListener
+
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIDOMEVENTLISTENER
+
+  nsPrintPreviewListener(mozilla::dom::EventTarget* aTarget);
+  ~nsPrintPreviewListener();
+
+  // Add/remove the relevant listeners, based on what interfaces
+  // the embedding chrome implements.
+  nsresult AddListeners();
+  nsresult RemoveListeners();
+
+private:
+
+  nsCOMPtr<mozilla::dom::EventTarget> mEventTarget;
+
+}; // class nsPrintPreviewListener
+
+
+
+#endif /* nsPrintPreviewListener_h__ */