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

content/child/service_worker/web_service_worker_registration_impl.cc

 // Copyright 2014 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/child/service_worker/web_service_worker_registration_impl.h"
 
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 105 matching lines @@
 
 blink::WebServiceWorkerRegistrationProxy*
 WebServiceWorkerRegistrationImpl::proxy() {
   return proxy_;
 }
 
 blink::WebURL WebServiceWorkerRegistrationImpl::scope() const {
   return handle_ref_->scope();
 }
 
+bool WebServiceWorkerRegistrationImpl::useCache() const {
+  return handle_ref_->useCache();
+}
+
 void WebServiceWorkerRegistrationImpl::update(
     blink::WebServiceWorkerProvider* provider,
     std::unique_ptr<WebServiceWorkerUpdateCallbacks> callbacks) {
   WebServiceWorkerProviderImpl* provider_impl =
       static_cast<WebServiceWorkerProviderImpl*>(provider);
   ServiceWorkerDispatcher* dispatcher =
       ServiceWorkerDispatcher::GetThreadSpecificInstance();
   DCHECK(dispatcher);
   dispatcher->UpdateServiceWorker(provider_impl->provider_id(),
                                   registrationId(), std::move(callbacks));
@@ skipping 65 matching lines @@
 }
 
 WebServiceWorkerRegistrationImpl::~WebServiceWorkerRegistrationImpl() {
   ServiceWorkerDispatcher* dispatcher =
       ServiceWorkerDispatcher::GetThreadSpecificInstance();
   if (dispatcher)
     dispatcher->RemoveServiceWorkerRegistration(handle_ref_->handle_id());
 }
 
 }  // namespace content