|  | /* | 
|  | *  Copyright 2018 The WebRTC Project Authors. All rights reserved. | 
|  | * | 
|  | *  Use of this source code is governed by a BSD-style license | 
|  | *  that can be found in the LICENSE file in the root of the source | 
|  | *  tree. An additional intellectual property rights grant can be found | 
|  | *  in the file PATENTS.  All contributing project authors may | 
|  | *  be found in the AUTHORS file in the root of the source tree. | 
|  | */ | 
|  |  | 
|  | #ifndef API_ASYNC_RESOLVER_FACTORY_H_ | 
|  | #define API_ASYNC_RESOLVER_FACTORY_H_ | 
|  |  | 
|  | #include "rtc_base/async_resolver_interface.h" | 
|  |  | 
|  | namespace webrtc { | 
|  |  | 
|  | // An abstract factory for creating AsyncResolverInterfaces. This allows | 
|  | // client applications to provide WebRTC with their own mechanism for | 
|  | // performing DNS resolution. | 
|  | class AsyncResolverFactory { | 
|  | public: | 
|  | AsyncResolverFactory() = default; | 
|  | virtual ~AsyncResolverFactory() = default; | 
|  |  | 
|  | // The caller should call Destroy on the returned object to delete it. | 
|  | virtual rtc::AsyncResolverInterface* Create() = 0; | 
|  | }; | 
|  |  | 
|  | }  // namespace webrtc | 
|  |  | 
|  | #endif  // API_ASYNC_RESOLVER_FACTORY_H_ |