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diff --git a/third_party/libwebrtc/modules/desktop_capture/shared_desktop_frame.h b/third_party/libwebrtc/modules/desktop_capture/shared_desktop_frame.h
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+++ b/third_party/libwebrtc/modules/desktop_capture/shared_desktop_frame.h
@@ -0,0 +1,65 @@
+/*
+ *  Copyright (c) 2013 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_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
+#define MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
+
+#include <memory>
+
+#include "api/scoped_refptr.h"
+#include "modules/desktop_capture/desktop_frame.h"
+#include "rtc_base/ref_counted_object.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// SharedDesktopFrame is a DesktopFrame that may have multiple instances all
+// sharing the same buffer.
+class RTC_EXPORT SharedDesktopFrame final : public DesktopFrame {
+ public:
+  ~SharedDesktopFrame() override;
+
+  SharedDesktopFrame(const SharedDesktopFrame&) = delete;
+  SharedDesktopFrame& operator=(const SharedDesktopFrame&) = delete;
+
+  static std::unique_ptr<SharedDesktopFrame> Wrap(
+      std::unique_ptr<DesktopFrame> desktop_frame);
+
+  // Deprecated.
+  // TODO(sergeyu): remove this method.
+  static SharedDesktopFrame* Wrap(DesktopFrame* desktop_frame);
+
+  // Deprecated. Clients do not need to know the underlying DesktopFrame
+  // instance.
+  // TODO(zijiehe): Remove this method.
+  // Returns the underlying instance of DesktopFrame.
+  DesktopFrame* GetUnderlyingFrame();
+
+  // Returns whether `this` and `other` share the underlying DesktopFrame.
+  bool ShareFrameWith(const SharedDesktopFrame& other) const;
+
+  // Creates a clone of this object.
+  std::unique_ptr<SharedDesktopFrame> Share();
+
+  // Checks if the frame is currently shared. If it returns false it's
+  // guaranteed that there are no clones of the object.
+  bool IsShared();
+
+ private:
+  typedef rtc::FinalRefCountedObject<std::unique_ptr<DesktopFrame>> Core;
+
+  SharedDesktopFrame(rtc::scoped_refptr<Core> core);
+
+  const rtc::scoped_refptr<Core> core_;
+};
+
+}  // namespace webrtc
+
+#endif  // MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_