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diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/mock/mock_render_delay_controller.h b/third_party/libwebrtc/modules/audio_processing/aec3/mock/mock_render_delay_controller.h
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+++ b/third_party/libwebrtc/modules/audio_processing/aec3/mock/mock_render_delay_controller.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_PROCESSING_AEC3_MOCK_MOCK_RENDER_DELAY_CONTROLLER_H_
+#define MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_RENDER_DELAY_CONTROLLER_H_
+
+#include "absl/types/optional.h"
+#include "api/array_view.h"
+#include "modules/audio_processing/aec3/downsampled_render_buffer.h"
+#include "modules/audio_processing/aec3/render_delay_controller.h"
+#include "test/gmock.h"
+
+namespace webrtc {
+namespace test {
+
+class MockRenderDelayController : public RenderDelayController {
+ public:
+  MockRenderDelayController();
+  virtual ~MockRenderDelayController();
+
+  MOCK_METHOD(void, Reset, (bool reset_delay_statistics), (override));
+  MOCK_METHOD(void, LogRenderCall, (), (override));
+  MOCK_METHOD(absl::optional<DelayEstimate>,
+              GetDelay,
+              (const DownsampledRenderBuffer& render_buffer,
+               size_t render_delay_buffer_delay,
+               const Block& capture),
+              (override));
+  MOCK_METHOD(bool, HasClockdrift, (), (const, override));
+};
+
+}  // namespace test
+}  // namespace webrtc
+
+#endif  // MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_RENDER_DELAY_CONTROLLER_H_