Add IDL and initial Blink API for Background Sync

Source/modules/background_sync/ServiceWorkerRegistrationSync.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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 "config.h"
-#include "modules/push_messaging/ServiceWorkerRegistrationPush.h"
+#include "modules/background_sync/ServiceWorkerRegistrationSync.h"
 
-#include "modules/push_messaging/PushManager.h"
+#include "modules/background_sync/SyncManager.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 
 namespace blink {
 
-ServiceWorkerRegistrationPush::ServiceWorkerRegistrationPush(ServiceWorkerRegistration* registration)
+ServiceWorkerRegistrationSync::ServiceWorkerRegistrationSync(ServiceWorkerRegistration* registration)
     : m_registration(registration)
 {
 }
 
-ServiceWorkerRegistrationPush::~ServiceWorkerRegistrationPush()
+ServiceWorkerRegistrationSync::~ServiceWorkerRegistrationSync()
 {
 }
 
-const char* ServiceWorkerRegistrationPush::supplementName()
+const char* ServiceWorkerRegistrationSync::supplementName()
 {
-    return "ServiceWorkerRegistrationPush";
+    return "ServiceWorkerRegistrationSync";
 }
 
-ServiceWorkerRegistrationPush& ServiceWorkerRegistrationPush::from(ServiceWorkerRegistration& registration)
+ServiceWorkerRegistrationSync& ServiceWorkerRegistrationSync::from(ServiceWorkerRegistration& registration)
 {
-    ServiceWorkerRegistrationPush* supplement = static_cast<ServiceWorkerRegistrationPush*>(HeapSupplement<ServiceWorkerRegistration>::from(registration, supplementName()));
+    ServiceWorkerRegistrationSync* supplement = static_cast<ServiceWorkerRegistrationSync*>(HeapSupplement<ServiceWorkerRegistration>::from(registration, supplementName()));
     if (!supplement) {
-        supplement = new ServiceWorkerRegistrationPush(&registration);
+        supplement = new ServiceWorkerRegistrationSync(&registration);
         provideTo(registration, supplementName(), supplement);
     }
     return *supplement;
 }
 
-PushManager* ServiceWorkerRegistrationPush::pushManager(ServiceWorkerRegistration& registration)
+SyncManager* ServiceWorkerRegistrationSync::syncManager(ServiceWorkerRegistration& registration)
 {
-    return ServiceWorkerRegistrationPush::from(registration).pushManager();
+    return ServiceWorkerRegistrationSync::from(registration).syncManager();
 }
 
-PushManager* ServiceWorkerRegistrationPush::pushManager()
+SyncManager* ServiceWorkerRegistrationSync::syncManager()
 {
-    if (!m_pushManager)
-        m_pushManager = PushManager::create(m_registration);
-    return m_pushManager.get();
+    if (!m_syncManager)
+        m_syncManager = SyncManager::create(m_registration);
+    return m_syncManager.get();
 }
 
-DEFINE_TRACE(ServiceWorkerRegistrationPush)
+DEFINE_TRACE(ServiceWorkerRegistrationSync)
 {
     visitor->trace(m_registration);
-    visitor->trace(m_pushManager);
+    visitor->trace(m_syncManager);
     HeapSupplement<ServiceWorkerRegistration>::trace(visitor);
 }
 
 } // namespace blink