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

third_party/WebKit/Source/modules/background_sync/SyncCallbacks.cpp

 // 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 "modules/background_sync/SyncCallbacks.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "modules/background_sync/SyncError.h"
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 SyncRegistrationCallbacks::SyncRegistrationCallbacks(ScriptPromiseResolver* resolver, ServiceWorkerRegistration* serviceWorkerRegistration)
     : m_resolver(resolver)
     , m_serviceWorkerRegistration(serviceWorkerRegistration)
 {
     ASSERT(m_resolver);
     ASSERT(m_serviceWorkerRegistration);
 }
 
 SyncRegistrationCallbacks::~SyncRegistrationCallbacks()
 {
 }
 
-void SyncRegistrationCallbacks::onSuccess(WebPassOwnPtr<WebSyncRegistration> webSyncRegistration)
+void SyncRegistrationCallbacks::onSuccess(std::unique_ptr<WebSyncRegistration> webSyncRegistration)
 {
     if (!m_resolver->getExecutionContext() || m_resolver->getExecutionContext()->activeDOMObjectsAreStopped()) {
         return;
     }
 
-    OwnPtr<WebSyncRegistration> registration = webSyncRegistration.release();
+    OwnPtr<WebSyncRegistration> registration = adoptPtr(webSyncRegistration.release());

[dcheng, 2016/04/07 00:26:12]

FWIW, I think we'd be saving ourself trouble down the road if you could just
write std::move(webSyncRegistration) here.

     if (!registration) {
         m_resolver->resolve(v8::Null(m_resolver->getScriptState()->isolate()));
         return;
     }
     m_resolver->resolve();
 }
 
 void SyncRegistrationCallbacks::onError(const WebSyncError& error)
 {
     if (!m_resolver->getExecutionContext() || m_resolver->getExecutionContext()->activeDOMObjectsAreStopped()) {
@@ skipping 28 matching lines @@
 
 void SyncGetRegistrationsCallbacks::onError(const WebSyncError& error)
 {
     if (!m_resolver->getExecutionContext() || m_resolver->getExecutionContext()->activeDOMObjectsAreStopped()) {
         return;
     }
     m_resolver->reject(SyncError::take(m_resolver.get(), error));
 }
 
 } // namespace blink