Tracing for NavigationHandle lifetime and state.

content/browser/devtools/page_navigation_throttle.cc

Index: content/browser/devtools/page_navigation_throttle.cc
diff --git a/content/browser/devtools/page_navigation_throttle.cc b/content/browser/devtools/page_navigation_throttle.cc
index 5f9e58ed5fb922df0697f79ae1ae426b7bd32bb3..013acbc2f69c1aeee2b9141d3a1294622391c5e3 100644
--- a/content/browser/devtools/page_navigation_throttle.cc
+++ b/content/browser/devtools/page_navigation_throttle.cc
@@ -44,6 +44,10 @@ PageNavigationThrottle::WillRedirectRequest() {
   return ThrottleCheckResult::DEFER;
 }
 
+const char* PageNavigationThrottle::GetNameForLogging() {
+  return "PageNavigationThrottle";
+}
+
 void PageNavigationThrottle::AlwaysProceed() {
   // Makes WillStartRequest and WillRedirectRequest always return
   // ThrottleCheckResult::PROCEED.