XPCNativeInterface::DestroyInstance(JSContext* cx, XPCJSRuntime* rt, XPCNativeInterface* inst)
XPCNativeSet::DestroyInstance(XPCNativeSet* inst)
XPCNativeInterface::DestroyInstance(JSContext* cx, XPCJSRuntime* rt,                                    XPCNativeInterface* inst){    inst->~XPCNativeInterface();    delete [] (char*) inst;}