service worker: Persist NavigationPreloadState

content/browser/service_worker/service_worker_registration.cc

 // 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.
 
 #include "content/browser/service_worker/service_worker_registration.h"
 
 #include <vector>
 
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
@@ skipping 374 matching lines @@
   for (const auto& callback : callbacks)
     callback.Run();
 }
 
 void ServiceWorkerRegistration::SetTaskRunnerForTest(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   task_runner_ = task_runner;
 }
 
 void ServiceWorkerRegistration::EnableNavigationPreload(bool enable) {
-  if (navigation_preload_state_.enabled == enable)
-    return;
   navigation_preload_state_.enabled = enable;
   if (active_version_)
     active_version_->SetNavigationPreloadState(navigation_preload_state_);
 }
 
 void ServiceWorkerRegistration::SetNavigationPreloadHeader(
     const std::string& header) {
-  if (navigation_preload_state_.header == header)
-    return;
   navigation_preload_state_.header = header;
   if (active_version_)
     active_version_->SetNavigationPreloadState(navigation_preload_state_);
 }
 
 void ServiceWorkerRegistration::RegisterRegistrationFinishedCallback(
     const base::Closure& callback) {
   // This should only be called if the registration is in progress.
   DCHECK(!active_version() && !waiting_version() && !is_uninstalled() &&
          !is_uninstalling());
@@ skipping 101 matching lines @@
   if (!context_) {
     callback.Run(SERVICE_WORKER_ERROR_ABORT);
     return;
   }
   context_->storage()->NotifyDoneInstallingRegistration(
       this, version.get(), status);
   callback.Run(status);
 }
 
 }  // namespace content