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diff --git a/third_party/libwebrtc/api/frame_transformer_factory.h b/third_party/libwebrtc/api/frame_transformer_factory.h
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+/*
+ *  Copyright 2022 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_FRAME_TRANSFORMER_FACTORY_H_
+#define API_FRAME_TRANSFORMER_FACTORY_H_
+
+#include <memory>
+#include <vector>
+
+#include "api/frame_transformer_interface.h"
+#include "api/scoped_refptr.h"
+#include "api/video/encoded_frame.h"
+#include "api/video/video_frame_metadata.h"
+
+// This file contains EXPERIMENTAL functions to create video frames from
+// either an old video frame or directly from parameters.
+// These functions will be used in Chrome functionality to manipulate
+// encoded frames from Javascript.
+namespace webrtc {
+
+// TODO(bugs.webrtc.org/14708): Add the required parameters to these APIs.
+std::unique_ptr<TransformableVideoFrameInterface> CreateVideoSenderFrame();
+// TODO(bugs.webrtc.org/14708): Consider whether Receiver frames ever make sense
+// to create.
+std::unique_ptr<TransformableVideoFrameInterface> CreateVideoReceiverFrame();
+// Creates a new frame with the same metadata as the original.
+// The original can be a sender or receiver frame.
+RTC_EXPORT std::unique_ptr<TransformableVideoFrameInterface> CloneVideoFrame(
+    TransformableVideoFrameInterface* original);
+}  // namespace webrtc
+
+#endif  // API_FRAME_TRANSFORMER_FACTORY_H_