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diff --git a/third_party/libwebrtc/api/neteq/custom_neteq_factory.h b/third_party/libwebrtc/api/neteq/custom_neteq_factory.h
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+++ b/third_party/libwebrtc/api/neteq/custom_neteq_factory.h
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+/*
+ *  Copyright (c) 2019 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_NETEQ_CUSTOM_NETEQ_FACTORY_H_
+#define API_NETEQ_CUSTOM_NETEQ_FACTORY_H_
+
+#include <memory>
+
+#include "api/audio_codecs/audio_decoder_factory.h"
+#include "api/neteq/neteq_controller_factory.h"
+#include "api/neteq/neteq_factory.h"
+#include "api/scoped_refptr.h"
+#include "system_wrappers/include/clock.h"
+
+namespace webrtc {
+
+// This factory can be used to generate NetEq instances that make use of a
+// custom NetEqControllerFactory.
+class CustomNetEqFactory : public NetEqFactory {
+ public:
+  explicit CustomNetEqFactory(
+      std::unique_ptr<NetEqControllerFactory> controller_factory);
+  ~CustomNetEqFactory() override;
+  CustomNetEqFactory(const CustomNetEqFactory&) = delete;
+  CustomNetEqFactory& operator=(const CustomNetEqFactory&) = delete;
+
+  std::unique_ptr<NetEq> CreateNetEq(
+      const NetEq::Config& config,
+      const rtc::scoped_refptr<AudioDecoderFactory>& decoder_factory,
+      Clock* clock) const override;
+
+ private:
+  std::unique_ptr<NetEqControllerFactory> controller_factory_;
+};
+
+}  // namespace webrtc
+#endif  // API_NETEQ_CUSTOM_NETEQ_FACTORY_H_