Add log date to the metrics log

components/metrics/persisted_logs_unittest.cc

Index: components/metrics/persisted_logs_unittest.cc
diff --git a/components/metrics/persisted_logs_unittest.cc b/components/metrics/persisted_logs_unittest.cc
index b4a79a73ea626e9c02db9d0938bb987c4907d537..47ab029aa2ac471b02b8077103b3cc039c158bc2 100644
--- a/components/metrics/persisted_logs_unittest.cc
+++ b/components/metrics/persisted_logs_unittest.cc
@@ -111,6 +111,8 @@ TEST_F(PersistedLogsTest, SingleElementLogList) {
   EXPECT_EQ(persisted_logs.staged_log(), result_persisted_logs.staged_log());
   EXPECT_EQ(persisted_logs.staged_log_hash(),
             result_persisted_logs.staged_log_hash());
+  EXPECT_EQ(persisted_logs.staged_log_timestamp(),
+            result_persisted_logs.staged_log_timestamp());
 }
 
 // Store a set of logs over the length limit, but smaller than the min number of