--- a/dom/media/gmp/GMPServiceParent.h
+++ b/dom/media/gmp/GMPServiceParent.h
@@ -44,17 +44,16 @@ public:
                        bool aInPrivateBrowsingMode,
                        UniquePtr<GetNodeIdCallback>&& aCallback) override;
 
   NS_DECL_MOZIGECKOMEDIAPLUGINCHROMESERVICE
   NS_DECL_NSIOBSERVER
 
   void AsyncShutdownNeeded(GMPParent* aParent);
   void AsyncShutdownComplete(GMPParent* aParent);
-  void AbortAsyncShutdown();
 
   int32_t AsyncShutdownTimeoutMs();
 
 private:
   friend class GMPServiceParent;
 
   virtual ~GeckoMediaPluginServiceParent();