scoped_ptr<AbortHelper> AbortHelper::TakeOwnership(
const base::WeakPtr<AbortHelper>& abort_helper) {
if (!abort_helper)
- return scoped_ptr<AbortHelper>();
+ return nullptr;
scoped_ptr<AbortHelper> result =
abort_helper->tracker_->PassAbortHelper(abort_helper.get());
abort_helper->weak_ptr_factory_.InvalidateWeakPtrs();