Move content/child/background_sync to Blink.

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 173 matching lines @@
   DCHECK(dispatcher);
   dispatcher->SetNavigationPreloadHeader(provider_impl->provider_id(),
                                          registration_id(), value.utf8(),
                                          std::move(callbacks));
 }
 
 int64_t WebServiceWorkerRegistrationImpl::registration_id() const {
   return handle_ref_->registration_id();
 }
 
+int64_t WebServiceWorkerRegistrationImpl::registrationId() const {
+  return registration_id();
+}

[falken, 2016/11/11 07:59:17]

For code health, can we remove registration_id() and just use registrationId()?

[falken, 2016/11/11 08:08:07]

(it's OK to do this as a followup patch, perhaps just add a TODO in the header
file)

[adithyas, 2016/11/11 15:11:56]

The function is used in 6 other files, so I'll make the changes in another
patch. Adding a TODO for now.

+
 // static
 std::unique_ptr<blink::WebServiceWorkerRegistration::Handle>
 WebServiceWorkerRegistrationImpl::CreateHandle(
     const scoped_refptr<WebServiceWorkerRegistrationImpl>& registration) {
   if (!registration)
     return nullptr;
   return base::MakeUnique<HandleImpl>(registration);
 }
 
 blink::WebServiceWorkerRegistration::Handle*
 WebServiceWorkerRegistrationImpl::CreateLeakyHandle(
     const scoped_refptr<WebServiceWorkerRegistrationImpl>& registration) {
   if (!registration)
     return nullptr;
   return new HandleImpl(registration);
 }
 
 WebServiceWorkerRegistrationImpl::~WebServiceWorkerRegistrationImpl() {
   ServiceWorkerDispatcher* dispatcher =
       ServiceWorkerDispatcher::GetThreadSpecificInstance();
   if (dispatcher)
     dispatcher->RemoveServiceWorkerRegistration(handle_ref_->handle_id());
 }
 
 }  // namespace content