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

third_party/WebKit/Source/modules/background_sync/SyncCallbacks.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 SyncCallbacks_h
 #define SyncCallbacks_h
 
 #include "platform/heap/Handle.h"
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/modules/background_sync/WebSyncProvider.h"
@@ skipping 16 matching lines @@
 // will pass it to the SyncRegistration.
 class SyncRegistrationCallbacks final : public WebSyncRegistrationCallbacks {
     WTF_MAKE_NONCOPYABLE(SyncRegistrationCallbacks);
     // FIXME(tasak): when making public/platform classes to use PartitionAlloc,
     // the following macro should be moved to WebCallbacks defined in public/platformWebCallbacks.h.
     USING_FAST_MALLOC(SyncRegistrationCallbacks);
 public:
     SyncRegistrationCallbacks(ScriptPromiseResolver*, ServiceWorkerRegistration*);
     ~SyncRegistrationCallbacks() override;
 
-    void onSuccess(WebPassOwnPtr<WebSyncRegistration>) override;
+    void onSuccess(std::unique_ptr<WebSyncRegistration>) override;
     void onError(const WebSyncError&) override;
 
 private:
     Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };
 
 // SyncGetRegistrationsCallbacks is an implementation of WebSyncGetRegistrationsCallbacks
 // that will resolve the underlying promise depending on the result passed to
 // the callback. It takes a ServiceWorkerRegistration in its constructor and
@@ skipping 11 matching lines @@
     void onError(const WebSyncError&) override;
 
 private:
     Persistent<ScriptPromiseResolver> m_resolver;
     Persistent<ServiceWorkerRegistration> m_serviceWorkerRegistration;
 };
 
 } // namespace blink
 
 #endif // SyncCallbacks_h