Bug 758992 - Make the classes which use the XPCOM nsISupports implementation macros final, to avoid the warning about deleting using a pointer to a base class with virtual functions and no virtual dtor (more widget parts); r=roc

widget/tests/TestAppShellSteadyState.cpp

@@ -23,6 +23,7 @@
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsNetUtil.h"
 #include "nsThreadUtils.h"
+#include "mozilla/Attributes.h"
 
 #ifdef XP_WIN
 #include <windows.h>
@@ -158,7 +159,7 @@ public:
   }
 };
 
-class EventListener : public nsIDOMEventListener
+class EventListener MOZ_FINAL : public nsIDOMEventListener
 {
   nsCOMPtr<nsIAppShell> mAppShell;