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

content/child/background_sync/background_sync_provider.cc

 // 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 "content/child/background_sync/background_sync_provider.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 120 matching lines @@
     scoped_ptr<blink::WebSyncRegistrationCallbacks> callbacks,
     mojom::BackgroundSyncError error,
     const mojom::SyncRegistrationPtr& options) {
   // TODO(iclelland): Determine the correct error message to return in each case
   scoped_ptr<blink::WebSyncRegistration> result;
   switch (error) {
     case mojom::BackgroundSyncError::NONE:
       if (!options.is_null())
         result =
             mojo::ConvertTo<scoped_ptr<blink::WebSyncRegistration>>(options);
-      callbacks->onSuccess(blink::adoptWebPtr(result.release()));
+      callbacks->onSuccess(std::move(result));
       break;
     case mojom::BackgroundSyncError::NOT_FOUND:
       NOTREACHED();
       break;
     case mojom::BackgroundSyncError::STORAGE:
       callbacks->onError(
           blink::WebSyncError(blink::WebSyncError::ErrorTypeUnknown,
                               "Background Sync is disabled."));
       break;
     case mojom::BackgroundSyncError::NOT_ALLOWED:
@@ skipping 58 matching lines @@
     mojo::InterfaceRequest<mojom::BackgroundSyncService> request =
         mojo::GetProxy(&background_sync_service_);
     main_thread_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&ConnectToServiceOnMainThread, base::Passed(&request)));
   }
   return background_sync_service_;
 }
 
 }  // namespace content