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 cd9f3552b9c16e0f0f1e4372300bc85cec7f8e1f..74ff9db7ff5c67c6bbc50500892291676ded2d3a 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_;