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diff --git a/third_party/libwebrtc/modules/audio_device/include/audio_device_data_observer.h b/third_party/libwebrtc/modules/audio_device/include/audio_device_data_observer.h
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+++ b/third_party/libwebrtc/modules/audio_device/include/audio_device_data_observer.h
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+/*
+ *  Copyright (c) 2017 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 MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_DATA_OBSERVER_H_
+#define MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_DATA_OBSERVER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "absl/base/attributes.h"
+#include "api/scoped_refptr.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "modules/audio_device/include/audio_device.h"
+
+namespace webrtc {
+
+// This interface will capture the raw PCM data of both the local captured as
+// well as the mixed/rendered remote audio.
+class AudioDeviceDataObserver {
+ public:
+  virtual void OnCaptureData(const void* audio_samples,
+                             size_t num_samples,
+                             size_t bytes_per_sample,
+                             size_t num_channels,
+                             uint32_t samples_per_sec) = 0;
+
+  virtual void OnRenderData(const void* audio_samples,
+                            size_t num_samples,
+                            size_t bytes_per_sample,
+                            size_t num_channels,
+                            uint32_t samples_per_sec) = 0;
+
+  AudioDeviceDataObserver() = default;
+  virtual ~AudioDeviceDataObserver() = default;
+};
+
+// Creates an ADMWrapper around an ADM instance that registers
+// the provided AudioDeviceDataObserver.
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    rtc::scoped_refptr<AudioDeviceModule> impl,
+    std::unique_ptr<AudioDeviceDataObserver> observer);
+
+// Creates an ADMWrapper around an ADM instance that registers
+// the provided AudioDeviceDataObserver.
+ABSL_DEPRECATED("")
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    rtc::scoped_refptr<AudioDeviceModule> impl,
+    AudioDeviceDataObserver* observer);
+
+// Creates an ADM instance with AudioDeviceDataObserver registered.
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    AudioDeviceModule::AudioLayer audio_layer,
+    TaskQueueFactory* task_queue_factory,
+    std::unique_ptr<AudioDeviceDataObserver> observer);
+
+// Creates an ADM instance with AudioDeviceDataObserver registered.
+ABSL_DEPRECATED("")
+rtc::scoped_refptr<AudioDeviceModule> CreateAudioDeviceWithDataObserver(
+    AudioDeviceModule::AudioLayer audio_layer,
+    TaskQueueFactory* task_queue_factory,
+    AudioDeviceDataObserver* observer);
+
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_DEVICE_INCLUDE_AUDIO_DEVICE_DATA_OBSERVER_H_