Show more detailed error info of navigation preload in DevTools Network tab

content/browser/devtools/protocol/network_handler.cc

Index: content/browser/devtools/protocol/network_handler.cc
diff --git a/content/browser/devtools/protocol/network_handler.cc b/content/browser/devtools/protocol/network_handler.cc
index 94eb1e885da45e309bd26f0b0c398e0f28774597..700f10f38b400d42a1d96afc63b03c03970f21d7 100644
--- a/content/browser/devtools/protocol/network_handler.cc
+++ b/content/browser/devtools/protocol/network_handler.cc
@@ -696,9 +696,11 @@ void NetworkHandler::NavigationPreloadCompleted(
     return;
   if (completion_status.error_code != net::OK) {
     frontend_->LoadingFailed(
-        request_id, base::TimeTicks::Now().ToInternalValue() /
-                        static_cast<double>(base::Time::kMicrosecondsPerSecond),
-        Page::ResourceTypeEnum::Other, "Navigation Preload Error",
+        request_id,
+        base::TimeTicks::Now().ToInternalValue() /
+            static_cast<double>(base::Time::kMicrosecondsPerSecond),
+        Page::ResourceTypeEnum::Other,
+        net::ErrorToString(completion_status.error_code),
         completion_status.error_code == net::Error::ERR_ABORTED);
   }
   frontend_->LoadingFinished(