Backed out changeset bf8d5d78b27e

widget/windows/nsAppShell.h

@@ -27,7 +27,6 @@ public:
     mLastNativeEventScheduledMutex("nsAppShell::mLastNativeEventScheduledMutex")
   {}
   typedef mozilla::TimeStamp TimeStamp;
-  typedef mozilla::Mutex Mutex;
 
   nsresult Init();
   void DoProcessMoreGeckoEvents();