[page_load_metrics] Eagerly send IPCs on navigation commit

components/page_load_metrics/renderer/metrics_render_frame_observer.cc

Index: components/page_load_metrics/renderer/metrics_render_frame_observer.cc
diff --git a/components/page_load_metrics/renderer/metrics_render_frame_observer.cc b/components/page_load_metrics/renderer/metrics_render_frame_observer.cc
index aa146925d713a073770466c226e75f2d16c10c43..ee1cc6c0c2c8af3907c2710ef69f55c30ba2f461 100644
--- a/components/page_load_metrics/renderer/metrics_render_frame_observer.cc
+++ b/components/page_load_metrics/renderer/metrics_render_frame_observer.cc
@@ -65,8 +65,10 @@ void MetricsRenderFrameObserver::DidCommitProvisionalLoad(
   // non-null, we will send metrics for the current page at some later time, as
   // those metrics become available.
   if (ShouldSendMetrics()) {
+    PageLoadTiming timing(GetTiming());
+    DCHECK(!timing.navigation_start.is_null());
     page_timing_metrics_sender_.reset(
-        new PageTimingMetricsSender(this, routing_id(), CreateTimer()));
+        new PageTimingMetricsSender(this, routing_id(), CreateTimer(), timing));
   }
 }