100644 blob eb78385c5a520e377989eb40376dd67ee7ed9caa	BUILD.gn
100644 blob 8ebfa314bb436ced51528f905997c6ea3534b5d0	descendant.cc
100644 blob 36ce8625b0b5f0e5d696e1aeaa722d9b975b648b	descendant.h
100644 blob 1771a28b076d16d20093a69c418947142c81d490	descendant_impl.h
100644 blob 45d40643e34700c791e31c942f4fcc94bbfecde0	descendant_unittest.cc