From 8364375347246d762507b4163d18a25a9c627dac Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Tue, 19 Oct 2021 15:04:48 +0200
Subject: [PATCH] fix: ensure TracingAgent in place for SWs (#31459)

---
 shell/renderer/web_worker_observer.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/shell/renderer/web_worker_observer.cc b/shell/renderer/web_worker_observer.cc
index e2ae116cdd7f..2faec5ffc434 100644
--- a/shell/renderer/web_worker_observer.cc
+++ b/shell/renderer/web_worker_observer.cc
@@ -51,6 +51,10 @@ void WebWorkerObserver::WorkerScriptReadyForEvaluation(
   // Start the embed thread.
   node_bindings_->PrepareMessageLoop();
 
+  // Setup node tracing controller.
+  if (!node::tracing::TraceEventHelper::GetAgent())
+    node::tracing::TraceEventHelper::SetAgent(node::CreateAgent());
+
   // Setup node environment for each window.
   bool initialized = node::InitializeContext(worker_context);
   CHECK(initialized);