service worker: Plumb NavigationPreloadManager.enable/disable to browser-side

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 132 matching lines @@
   // Unsets the version and deletes its resources. Also deletes this
   // registration from storage if there is no longer a stored version.
   void DeleteVersion(const scoped_refptr<ServiceWorkerVersion>& version);
 
   void RegisterRegistrationFinishedCallback(const base::Closure& callback);
   void NotifyRegistrationFinished();
 
   void SetTaskRunnerForTest(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
+  void EnableNavigationPreload(bool enable);
+
  private:
   friend class base::RefCounted<ServiceWorkerRegistration>;
 
   ~ServiceWorkerRegistration() override;
 
   void UnsetVersionInternal(
       ServiceWorkerVersion* version,
       ChangedVersionAttributesMask* mask);
 
   // ServiceWorkerVersion::Listener override.
@@ skipping 22 matching lines @@
   void OnRestoreFinished(const StatusCallback& callback,
                          scoped_refptr<ServiceWorkerVersion> version,
                          ServiceWorkerStatusCode status);
 
   const GURL pattern_;
   const int64_t registration_id_;
   bool is_deleted_;
   bool is_uninstalling_;
   bool is_uninstalled_;
   bool should_activate_when_ready_;
+  bool is_navigation_preload_enabled_;
   base::Time last_update_check_;
   int64_t resources_total_size_bytes_;
 
   // This registration is the primary owner of these versions.
   scoped_refptr<ServiceWorkerVersion> active_version_;
   scoped_refptr<ServiceWorkerVersion> waiting_version_;
   scoped_refptr<ServiceWorkerVersion> installing_version_;
 
   base::ObserverList<Listener> listeners_;
   std::vector<base::Closure> registration_finished_callbacks_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistration);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_H_