Optional <TimeDelta> since they may be non existent.

components/page_load_metrics/browser/page_load_metrics_util.cc

Index: components/page_load_metrics/browser/page_load_metrics_util.cc
diff --git a/components/page_load_metrics/browser/page_load_metrics_util.cc b/components/page_load_metrics/browser/page_load_metrics_util.cc
index a9ead770ea308b064e88f1d5c375dadb6f5d5e95..96217bf00cd7df8399659dad5f9f67de77ce7a9d 100644
--- a/components/page_load_metrics/browser/page_load_metrics_util.cc
+++ b/components/page_load_metrics/browser/page_load_metrics_util.cc
@@ -14,8 +14,19 @@ namespace page_load_metrics {
 bool WasStartedInForegroundEventInForeground(base::TimeDelta event,
                                              const PageLoadExtraInfo& info) {
   return info.started_in_foreground && !event.is_zero() &&
-         (info.first_background_time.is_zero() ||
-          event < info.first_background_time);
+         (!info.first_background_time ||
+          event <= info.first_background_time.value());
+}
+
+// TODO (shivanisha) The above function is used for TimeDeltas coming over IPC.
+// Merge these two when page_load_metrics only handles Optional TimeDelta
+// values in the browser process.
+bool WasStartedInForegroundOptionalEventInForeground(
+    const base::Optional<base::TimeDelta>& event,
+    const PageLoadExtraInfo& info) {
+  return info.started_in_foreground && event &&
+         (!info.first_background_time ||
+          event.value() <= info.first_background_time.value());
 }
 
 bool WasParseInForeground(base::TimeDelta parse_start,
@@ -24,9 +35,9 @@ bool WasParseInForeground(base::TimeDelta parse_start,
   if (parse_start.is_zero()) {
     return false;
   }
-  const bool incomplete_parse_in_foreground =
-      parse_stop.is_zero() && info.started_in_foreground &&
-      info.first_background_time.is_zero();
+  const bool incomplete_parse_in_foreground = parse_stop.is_zero() &&
+                                              info.started_in_foreground &&
+                                              !info.first_background_time;
 
   return incomplete_parse_in_foreground ||
          WasStartedInForegroundEventInForeground(parse_stop, info);