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diff --git a/third_party/libwebrtc/media/base/fake_frame_source.h b/third_party/libwebrtc/media/base/fake_frame_source.h
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+++ b/third_party/libwebrtc/media/base/fake_frame_source.h
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+/*
+ *  Copyright (c) 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 MEDIA_BASE_FAKE_FRAME_SOURCE_H_
+#define MEDIA_BASE_FAKE_FRAME_SOURCE_H_
+
+#include "api/video/video_frame.h"
+#include "rtc_base/time_utils.h"
+
+namespace cricket {
+
+class FakeFrameSource {
+ public:
+  FakeFrameSource(int width,
+                  int height,
+                  int interval_us,
+                  int64_t timestamp_offset_us);
+  FakeFrameSource(int width, int height, int interval_us);
+
+  webrtc::VideoRotation GetRotation() const;
+  void SetRotation(webrtc::VideoRotation rotation);
+
+  webrtc::VideoFrame GetFrame();
+  webrtc::VideoFrame GetFrameRotationApplied();
+
+  // Override configuration.
+  webrtc::VideoFrame GetFrame(int width,
+                              int height,
+                              webrtc::VideoRotation rotation,
+                              int interval_us);
+
+ private:
+  const int width_;
+  const int height_;
+  const int interval_us_;
+
+  webrtc::VideoRotation rotation_ = webrtc::kVideoRotation_0;
+  int64_t next_timestamp_us_;
+};
+
+}  // namespace cricket
+
+#endif  // MEDIA_BASE_FAKE_FRAME_SOURCE_H_