Update OnCommit to return ObservePolicy.

chrome/browser/page_load_metrics/page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
index 7608bc2df6c226b0fbef5ebdfe2cb9cb6e32a5f7..3b9d48fa88d420674a3d79ba0f4be2d5c39728d9 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/page_load_metrics_observer.cc
@@ -44,6 +44,11 @@ FailedProvisionalLoadInfo::FailedProvisionalLoadInfo(base::TimeDelta interval,
 
 FailedProvisionalLoadInfo::~FailedProvisionalLoadInfo() {}
 
+PageLoadMetricsObserver::ObservePolicy PageLoadMetricsObserver::OnCommit(
+    content::NavigationHandle* navigation_handle) {
+  return CONTINUE_OBSERVING;
+}
+
 PageLoadMetricsObserver::ObservePolicy
 PageLoadMetricsObserver::FlushMetricsOnAppEnterBackground(
     const PageLoadTiming& timing,