PageLoadMetricsObservers observe individual page loads

chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc
index cfa4fbb00bcdf5a02616d717ff398ae35525741e..58df2d123978ae925e7a32dd63b33348bd841b10 100644
--- a/chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/stale_while_revalidate_metrics_observer.cc
@@ -11,9 +11,8 @@
 
 namespace chrome {
 
-StaleWhileRevalidateMetricsObserver::StaleWhileRevalidateMetricsObserver(
-    page_load_metrics::PageLoadMetricsObservable* metrics)
-    : is_interesting_domain_(false), metrics_(metrics) {}
+StaleWhileRevalidateMetricsObserver::StaleWhileRevalidateMetricsObserver()
+    : is_interesting_domain_(false) {}
 
 void StaleWhileRevalidateMetricsObserver::OnCommit(
     content::NavigationHandle* navigation_handle) {
@@ -47,9 +46,4 @@ void StaleWhileRevalidateMetricsObserver::OnComplete(
   }
 }
 
-void StaleWhileRevalidateMetricsObserver::OnPageLoadMetricsGoingAway() {
-  metrics_->RemoveObserver(this);
-  delete this;
-}
-
 }  // namespace chrome