After 24 hours, bust the browser cache when checking for ServiceWorker updates

content/browser/service_worker/service_worker_storage.h

Index: content/browser/service_worker/service_worker_storage.h
diff --git a/content/browser/service_worker/service_worker_storage.h b/content/browser/service_worker/service_worker_storage.h
index 30db1e960c1ff13e7c2ec1333c6dcb5803b03072..4648bf4c5c93d761b75bd2b747cd31e1c957ca69 100644
--- a/content/browser/service_worker/service_worker_storage.h
+++ b/content/browser/service_worker/service_worker_storage.h
@@ -104,6 +104,10 @@ class CONTENT_EXPORT ServiceWorkerStorage
       ServiceWorkerRegistration* registration,
       const StatusCallback& callback);
 
+  // Updates the stored time to match the value of
+  // registration->last_update_check().
+  void UpdateLastUpdateCheckTime(ServiceWorkerRegistration* registration);
+
   // Deletes the registration data for |registration_id|. If the registration's
   // version is live, its script resources will remain available.
   // PurgeResources should be called when it's OK to delete them.