service worker: Bump update time even when the script was identical

content/browser/service_worker/embedded_worker_instance.cc

Index: content/browser/service_worker/embedded_worker_instance.cc
diff --git a/content/browser/service_worker/embedded_worker_instance.cc b/content/browser/service_worker/embedded_worker_instance.cc
index f30a79df3397307346cda55d84ea05c6de78fc76..69b222a37f9200be1c1f5ca8cf6e8a8a85943b1c 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -560,8 +560,9 @@ void EmbeddedWorkerInstance::OnScriptLoaded() {
         duration, source, inflight_start_task_->start_situation());
   }
 
-  FOR_EACH_OBSERVER(Listener, listener_list_, OnScriptLoaded());
   starting_phase_ = SCRIPT_LOADED;
+  FOR_EACH_OBSERVER(Listener, listener_list_, OnScriptLoaded());
+  // |this| may be destroyed by the callback.
 }
 
 void EmbeddedWorkerInstance::OnURLJobCreatedForMainScript() {