HMAC_Rotate        64 components/rappor/byte_vector_utils.cc   if (!HMAC_Rotate(hmac1, Concat(*value, 0x00, provided_data), hmac2))
HMAC_Rotate        73 components/rappor/byte_vector_utils.cc   if (!HMAC_Rotate(*hmac2, Concat(*value, 0x01, provided_data), out_hmac))