diff -r 000000000000 -r 6474c204b198 xpfe/appshell/src/nsWindowMediator.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpfe/appshell/src/nsWindowMediator.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,78 @@
+/* -*- 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 nsWindowMediator_h_
+#define nsWindowMediator_h_
+
+#include "mozilla/Mutex.h"
+#include "nsCOMPtr.h"
+#include "nsIWindowMediator.h"
+#include "nsIObserver.h"
+#include "nsTArray.h"
+#include "nsXPIDLString.h"
+#include "nsWeakReference.h"
+#include "nsCRT.h"
+#include "nsCOMArray.h"
+
+class nsAppShellWindowEnumerator;
+class nsASXULWindowEarlyToLateEnumerator;
+class nsASDOMWindowEarlyToLateEnumerator;
+class nsASDOMWindowFrontToBackEnumerator;
+class nsASXULWindowFrontToBackEnumerator;
+class nsASDOMWindowBackToFrontEnumerator;
+class nsASXULWindowBackToFrontEnumerator;
+class nsIWindowMediatorListener;
+struct nsWindowInfo;
+struct PRLock;
+
+class nsWindowMediator :
+  public nsIWindowMediator,
+  public nsIObserver,
+  public nsSupportsWeakReference
+{
+friend class nsAppShellWindowEnumerator;
+friend class nsASXULWindowEarlyToLateEnumerator;
+friend class nsASDOMWindowEarlyToLateEnumerator;
+friend class nsASDOMWindowFrontToBackEnumerator;
+friend class nsASXULWindowFrontToBackEnumerator;
+friend class nsASDOMWindowBackToFrontEnumerator;
+friend class nsASXULWindowBackToFrontEnumerator;
+
+public:
+  nsWindowMediator();
+  virtual ~nsWindowMediator();
+
+  nsresult Init();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIWINDOWMEDIATOR
+  NS_DECL_NSIOBSERVER
+
+  static nsresult GetDOMWindow(nsIXULWindow* inWindow,
+                               nsCOMPtr<nsIDOMWindow>& outDOMWindow);
+
+private:
+  int32_t AddEnumerator(nsAppShellWindowEnumerator* inEnumerator);
+  int32_t RemoveEnumerator(nsAppShellWindowEnumerator* inEnumerator);
+  nsWindowInfo *MostRecentWindowInfo(const char16_t* inType);
+
+  nsresult      UnregisterWindow(nsWindowInfo *inInfo);
+  nsWindowInfo *GetInfoFor(nsIXULWindow *aWindow);
+  nsWindowInfo *GetInfoFor(nsIWidget *aWindow);
+  void          SortZOrderFrontToBack();
+  void          SortZOrderBackToFront();
+
+  nsTArray<nsAppShellWindowEnumerator*> mEnumeratorList;
+  nsWindowInfo *mOldestWindow;
+  nsWindowInfo *mTopmostWindow;
+  int32_t       mTimeStamp;
+  bool          mSortingZOrder;
+  bool          mReady;
+  mozilla::Mutex mListLock;
+
+  nsCOMArray<nsIWindowMediatorListener> mListeners;
+};
+
+#endif