Tracing for NavigationHandle lifetime and state.

chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc

Index: chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc
diff --git a/chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc b/chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc
index 005d2f7db146c1d1870d45e62d62c693a5e6e87c..d83213d6f7eb10d662f2e5882bb4a39fb2ed538c 100644
--- a/chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc
+++ b/chrome/browser/page_load_metrics/experiments/delay_navigation_throttle.cc
@@ -119,6 +119,10 @@ DelayNavigationThrottle::WillStartRequest() {
   return content::NavigationThrottle::DEFER;
 }
 
+const char* DelayNavigationThrottle::GetNameForLogging() {
+  return "DelayNavigationThrottle";
+}
+
 void DelayNavigationThrottle::OnDelayComplete() {
   base::TimeDelta actual_delay = base::TimeTicks::Now() - delay_start_time_;
   base::TimeDelta delay_delta = actual_delay - navigation_delay_;