Add log date to the metrics log

components/metrics/metrics_log_unittest.cc

Index: components/metrics/metrics_log_unittest.cc
diff --git a/components/metrics/metrics_log_unittest.cc b/components/metrics/metrics_log_unittest.cc
index 57a1209f1adfe809dee1b014bff7da3596ea43fb..0a187e5d80b1a550d5a8eeff15a884f2eafa0e0a 100644
--- a/components/metrics/metrics_log_unittest.cc
+++ b/components/metrics/metrics_log_unittest.cc
@@ -134,6 +134,8 @@ class MetricsLogTest : public testing::Test {
     EXPECT_TRUE(hardware.cpu().has_signature());
     EXPECT_TRUE(hardware.cpu().has_num_cores());
 
+    EXPECT_GE((base::Time::Now() - base::Time::UnixEpoch()).InSeconds(),
+              system_profile.log_date());
     // TODO(isherman): Verify other data written into the protobuf as a result
     // of this call.
   }