IP_DROP_MEMBERSHIP  391 native_client_sdk/src/libraries/third_party/newlib-extras/netinet/in.h #define	IP_DROP_MEMBERSHIP	13   /* ip_mreq; drop an IP group membership */
IP_DROP_MEMBERSHIP  444 third_party/npapi/npspy/extern/nspr/md/_macos.h #define IP_DROP_MEMBERSHIP IP_DROP_MEMBERSHIP