Keep alive ServiceWorkers when devtools is attached

content/browser/service_worker/service_worker_context_core.cc

Index: content/browser/service_worker/service_worker_context_core.cc
diff --git a/content/browser/service_worker/service_worker_context_core.cc b/content/browser/service_worker/service_worker_context_core.cc
index 2272c95851bf8eec3c0f5a09dd63d3b4d2ab4455..4cd36617c16c054b8d43672fc1318e37675c47d2 100644
--- a/content/browser/service_worker/service_worker_context_core.cc
+++ b/content/browser/service_worker/service_worker_context_core.cc
@@ -131,7 +131,8 @@ ServiceWorkerContextCore::ServiceWorkerContextCore(
       job_coordinator_(new ServiceWorkerJobCoordinator(AsWeakPtr())),
       next_handle_id_(0),
       next_registration_handle_id_(0),
-      observer_list_(observer_list) {
+      observer_list_(observer_list),
+      keep_alive_mode_(false) {
 }
 
 ServiceWorkerContextCore::ServiceWorkerContextCore(
@@ -401,6 +402,12 @@ void ServiceWorkerContextCore::SetBlobParametersForCache(
                                             blob_storage_context);
 }
 
+void ServiceWorkerContextCore::SetKeepAliveMode(bool keep_alive_mode) {
+  keep_alive_mode_ = keep_alive_mode;
+  for (auto& version : live_versions_)
+    version.second->SetKeepAliveMode(keep_alive_mode);
+}
+
 void ServiceWorkerContextCore::OnWorkerStarted(ServiceWorkerVersion* version) {
   if (!observer_list_.get())
     return;