Implement updateViaCache flag and no-cache by default for main service worker scripts

content/browser/service_worker/service_worker_register_job.h

Index: content/browser/service_worker/service_worker_register_job.h
diff --git a/content/browser/service_worker/service_worker_register_job.h b/content/browser/service_worker/service_worker_register_job.h
index 4fff29b8c55116741e7ab7d668e36ac11c0bd0d2..f9ba7567467f08a40d43c9cb719bd435bdba1fa6 100644
--- a/content/browser/service_worker/service_worker_register_job.h
+++ b/content/browser/service_worker/service_worker_register_job.h
@@ -45,7 +45,8 @@ class ServiceWorkerRegisterJob : public ServiceWorkerRegisterJobBase,
   CONTENT_EXPORT ServiceWorkerRegisterJob(
       base::WeakPtr<ServiceWorkerContextCore> context,
       const GURL& pattern,
-      const GURL& script_url);
+      const GURL& script_url,
+      bool use_cache);
 
   // For update jobs.
   CONTENT_EXPORT ServiceWorkerRegisterJob(
@@ -148,6 +149,7 @@ class ServiceWorkerRegisterJob : public ServiceWorkerRegisterJobBase,
   RegistrationJobType job_type_;
   const GURL pattern_;
   GURL script_url_;
+  const bool use_cache_;
   std::vector<RegistrationCallback> callbacks_;
   Phase phase_;
   Internal internal_;