Nuke WebPassOwnPtr<T> and replace it with std::unique_ptr<T>.

third_party/WebKit/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/WebPassOwnPtr.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
 #include "public/platform/modules/background_sync/WebSyncError.h"
 #include "public/platform/modules/background_sync/WebSyncRegistration.h"
 
+#include <memory>
+
 namespace blink {
 
 class WebServiceWorkerRegistration;
-using WebSyncRegistrationCallbacks = WebCallbacks<WebPassOwnPtr<WebSyncRegistration>, const WebSyncError&>;
+using WebSyncRegistrationCallbacks = WebCallbacks<std::unique_ptr<WebSyncRegistration>, const WebSyncError&>;
 using WebSyncGetRegistrationsCallbacks = WebCallbacks<const WebVector<WebSyncRegistration*>&, const 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 WebSyncGetRegistrationsCallbacks.
     // Does not take ownership of the WebServiceWorkerRegistration.
     virtual void getRegistrations(WebServiceWorkerRegistration*, WebSyncGetRegistrationsCallbacks*) = 0;
 };
 
 } // namespace blink
 
 #endif // WebSyncProvider_h