Update OnCommit to return ObservePolicy.

chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
index 1d897694888789eeb8335ca0e866d85216c75fa9..802c5fdae543d3cd54b5e57fa4c83f92bc564449 100644
--- a/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/from_gws_page_load_metrics_observer.cc
@@ -412,7 +412,8 @@ void FromGWSPageLoadMetricsObserver::OnStart(
   logger_.SetProvisionalUrl(navigation_handle->GetURL());
 }
 
-void FromGWSPageLoadMetricsObserver::OnCommit(
+page_load_metrics::PageLoadMetricsObserver::ObservePolicy
+FromGWSPageLoadMetricsObserver::OnCommit(
     content::NavigationHandle* navigation_handle) {
   // We'd like to also check navigation_handle->HasUserGesture() here, however
   // this signal is not carried forward for navigations that open links in new
@@ -427,6 +428,7 @@ void FromGWSPageLoadMetricsObserver::OnCommit(
           navigation_handle->GetPageTransition()));
 
   logger_.SetNavigationStart(navigation_handle->NavigationStart());
+  return CONTINUE_OBSERVING;
 }
 
 void FromGWSPageLoadMetricsObserver::OnDomContentLoadedEventStart(