// A randomly generated number, which determines cohorts data is reported for.
const char kRapporCohortSeed[] = "rappor.cohort_seed";
+// Timestamp of the last time we sampled daily metrics.
+const char kRapporLastDailySample[] = "rappor.last_daily_sample";
+
// A base-64 encoded, randomly generated byte string, which is used as a seed
// for redacting collected data.
// Important: This value should remain secret at the client, and never be