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 1271bc4b856ad95f15873ad880da1a741e5eb018..7456d76d8364e8537c4e993706c81e1e84e7866b 100644
--- a/content/browser/service_worker/embedded_worker_instance.cc
+++ b/content/browser/service_worker/embedded_worker_instance.cc
@@ -508,8 +508,9 @@ void EmbeddedWorkerInstance::OnScriptReadFinished() {
 }
 
 void EmbeddedWorkerInstance::OnScriptLoaded() {
-  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::OnThreadStarted(int thread_id) {