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

content/browser/service_worker/service_worker_registration.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 38 matching lines @@
         ServiceWorkerRegistration* registration) {}
     virtual void OnSkippedWaiting(ServiceWorkerRegistration* registation) {}
   };
 
   ServiceWorkerRegistration(const ServiceWorkerRegistrationOptions& options,
                             int64_t registration_id,
                             base::WeakPtr<ServiceWorkerContextCore> context);
 
   int64_t id() const { return registration_id_; }
   const GURL& pattern() const { return pattern_; }
+  blink::WebServiceWorkerUpdateViaCache update_via_cache() const {
+    return update_via_cache_;
+  }
 
   bool is_deleted() const { return is_deleted_; }
   void set_is_deleted(bool deleted) { is_deleted_ = deleted; }
 
   bool is_uninstalling() const { return is_uninstalling_; }
 
   void set_is_uninstalled(bool uninstalled) { is_uninstalled_ = uninstalled; }
   bool is_uninstalled() const { return is_uninstalled_; }
 
   int64_t resources_total_size_bytes() const {
@@ skipping 122 matching lines @@
   void OnDeleteFinished(ServiceWorkerStatusCode status);
 
   // This method corresponds to the [[ClearRegistration]] algorithm.
   void Clear();
 
   void OnRestoreFinished(const StatusCallback& callback,
                          scoped_refptr<ServiceWorkerVersion> version,
                          ServiceWorkerStatusCode status);
 
   const GURL pattern_;
+  const blink::WebServiceWorkerUpdateViaCache update_via_cache_;
   const int64_t registration_id_;
   bool is_deleted_;
   bool is_uninstalling_;
   bool is_uninstalled_;
   bool should_activate_when_ready_;
   NavigationPreloadState navigation_preload_state_;
   base::Time last_update_check_;
   int64_t resources_total_size_bytes_;
 
   // This registration is the primary owner of these versions.
@@ skipping 13 matching lines @@
   // It is stopped when activation completes or the active version is no
   // longer considered a lame duck.
   base::RepeatingTimer lame_duck_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_