Tracing for NavigationHandle lifetime and state.

content/browser/frame_host/ancestor_throttle.cc

Index: content/browser/frame_host/ancestor_throttle.cc
diff --git a/content/browser/frame_host/ancestor_throttle.cc b/content/browser/frame_host/ancestor_throttle.cc
index 10fb732930652a0c59bcbfeb5e860a5d557b1d77..8f52434d6ed4465089e8e2710a2115d0b4b4531a 100644
--- a/content/browser/frame_host/ancestor_throttle.cc
+++ b/content/browser/frame_host/ancestor_throttle.cc
@@ -167,6 +167,10 @@ AncestorThrottle::WillProcessResponse() {
   return NavigationThrottle::BLOCK_RESPONSE;
 }
 
+const char* AncestorThrottle::GetNameForLogging() {
+  return "AncestorThrottle";
+}
+
 NavigationThrottle::ThrottleCheckResult
 AncestorThrottle::CheckContentSecurityPolicyFrameSrc(bool is_redirect) {
   // If PlzNavigate is enabled, "frame-src" is enforced on the browser side,