TabManager checks if ServiceWorker exists on the suspending process

content/browser/service_worker/embedded_worker_registry.cc

Index: content/browser/service_worker/embedded_worker_registry.cc
diff --git a/content/browser/service_worker/embedded_worker_registry.cc b/content/browser/service_worker/embedded_worker_registry.cc
index fff48b95cdc5cafd4edb680a5d87403481671bfa..7e133391ecc56c160b66b00db16cdb5a9959aaa0 100644
--- a/content/browser/service_worker/embedded_worker_registry.cc
+++ b/content/browser/service_worker/embedded_worker_registry.cc
@@ -179,6 +179,10 @@ void EmbeddedWorkerRegistry::OnReportConsoleMessage(
                                  line_number, source_url);
 }
 
+bool EmbeddedWorkerRegistry::IsWorkerExists(int process_id) {
+  return base::ContainsKey(worker_process_map_, process_id);
+}
+
 void EmbeddedWorkerRegistry::AddChildProcessSender(
     int process_id,
     IPC::Sender* sender,