[Background Sync] Converting Blink code to the MVP API

public/platform/modules/background_sync/WebSyncProvider.h

 // 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.
 
 #ifndef WebSyncProvider_h
 #define WebSyncProvider_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
+#include "public/platform/modules/background_sync/WebSyncRegistration.h"
 
 namespace blink {
 
 class WebServiceWorkerRegistration;
 struct WebSyncError;
-struct WebSyncRegistration;
 
 using WebSyncRegistrationCallbacks = WebCallbacks<WebSyncRegistration, WebSyncError>;
 using WebSyncUnregistrationCallbacks = WebCallbacks<bool, WebSyncError>;
 using WebSyncGetRegistrationsCallbacks = WebCallbacks<WebVector<WebSyncRegistration*>, WebSyncError>;
 
 class WebSyncProvider {
 public:
     virtual ~WebSyncProvider() { }
 
     // Takes ownership of the WebSyncRegistrationCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void registerBackgroundSync(const WebSyncRegistration*, WebServiceWorkerRegistration*, WebSyncRegistrationCallbacks*) = 0;
 
     // Takes ownership of the WebSyncUnregistrationCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
-    virtual void unregisterBackgroundSync(const WebString&, WebServiceWorkerRegistration*, WebSyncUnregistrationCallbacks*) = 0;
+    virtual void unregisterBackgroundSync(blink::WebSyncRegistration::Periodicity, int64_t, WebServiceWorkerRegistration*, WebSyncUnregistrationCallbacks*) = 0;
 
     // Takes ownership of the WebSyncRegistrationCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
-    virtual void getRegistration(const WebString&, WebServiceWorkerRegistration*, WebSyncRegistrationCallbacks*) = 0;
+    virtual void getRegistration(blink::WebSyncRegistration::Periodicity, const WebString&, WebServiceWorkerRegistration*, WebSyncRegistrationCallbacks*) = 0;
 
     // Takes ownership of the WebSyncGetRegistrationsCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
-    virtual void getRegistrations(WebServiceWorkerRegistration*, WebSyncGetRegistrationsCallbacks*) = 0;
+    virtual void getRegistrations(blink::WebSyncRegistration::Periodicity, WebServiceWorkerRegistration*, WebSyncGetRegistrationsCallbacks*) = 0;
 };
 
 } // namespace blink
 
 #endif // WebSyncProvider_h