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diff --git a/gfx/layers/composite/RemoteTextureHostWrapper.h b/gfx/layers/composite/RemoteTextureHostWrapper.h
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+++ b/gfx/layers/composite/RemoteTextureHostWrapper.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_GFX_RemoteTextureHostWrapper_H
+#define MOZILLA_GFX_RemoteTextureHostWrapper_H
+
+#include "mozilla/layers/TextureHost.h"
+#include "mozilla/Monitor.h"
+
+namespace mozilla::layers {
+
+// This class wraps TextureHost of remote texture.
+// In sync mode, mRemoteTextureForDisplayList holds TextureHost of mTextureId.
+// In async mode, it could be previous remote texture's TextureHost that is
+// compatible to the mTextureId's TextureHost.
+class RemoteTextureHostWrapper : public TextureHost {
+ public:
+  static RefPtr<TextureHost> Create(const RemoteTextureId aTextureId,
+                                    const RemoteTextureOwnerId aOwnerId,
+                                    const base::ProcessId aForPid,
+                                    const gfx::IntSize aSize,
+                                    const TextureFlags aFlags);
+
+  void DeallocateDeviceData() override {}
+
+  gfx::SurfaceFormat GetFormat() const override;
+
+  already_AddRefed<gfx::DataSourceSurface> GetAsSurface() override {
+    return nullptr;
+  }
+
+  gfx::YUVColorSpace GetYUVColorSpace() const override;
+  gfx::ColorDepth GetColorDepth() const override;
+  gfx::ColorRange GetColorRange() const override;
+
+  gfx::IntSize GetSize() const override;
+
+  bool IsValid() override;
+
+#ifdef MOZ_LAYERS_HAVE_LOG
+  const char* Name() override { return "RemoteTextureHostWrapper"; }
+#endif
+
+  void CreateRenderTexture(
+      const wr::ExternalImageId& aExternalImageId) override;
+
+  void MaybeDestroyRenderTexture() override;
+
+  uint32_t NumSubTextures() override;
+
+  void PushResourceUpdates(wr::TransactionBuilder& aResources,
+                           ResourceUpdateOp aOp,
+                           const Range<wr::ImageKey>& aImageKeys,
+                           const wr::ExternalImageId& aExtID) override;
+
+  void PushDisplayItems(wr::DisplayListBuilder& aBuilder,
+                        const wr::LayoutRect& aBounds,
+                        const wr::LayoutRect& aClip, wr::ImageRendering aFilter,
+                        const Range<wr::ImageKey>& aImageKeys,
+                        PushDisplayItemFlagSet aFlags) override;
+
+  bool SupportsExternalCompositing(WebRenderBackend aBackend) override;
+
+  void UnbindTextureSource() override;
+
+  void NotifyNotUsed() override;
+
+  RemoteTextureHostWrapper* AsRemoteTextureHostWrapper() override {
+    return this;
+  }
+
+  TextureHostType GetTextureHostType() override;
+
+  bool IsWrappingSurfaceTextureHost() override;
+
+  bool CheckIsReadyForRendering();
+
+  void ApplyTextureFlagsToRemoteTexture();
+
+  const RemoteTextureId mTextureId;
+  const RemoteTextureOwnerId mOwnerId;
+  const base::ProcessId mForPid;
+  const gfx::IntSize mSize;
+
+ protected:
+  RemoteTextureHostWrapper(const RemoteTextureId aTextureId,
+                           const RemoteTextureOwnerId aOwnerId,
+                           const base::ProcessId aForPid,
+                           const gfx::IntSize aSize, const TextureFlags aFlags);
+  virtual ~RemoteTextureHostWrapper();
+
+  // Called only by RemoteTextureMap
+  TextureHost* GetRemoteTextureHostForDisplayList(
+      const MonitorAutoLock& aProofOfLock);
+  // Called only by RemoteTextureMap
+  void SetRemoteTextureHostForDisplayList(const MonitorAutoLock& aProofOfLock,
+                                          TextureHost* aTextureHost,
+                                          bool aIsSyncMode);
+  void ClearRemoteTextureHostForDisplayList(
+      const MonitorAutoLock& aProofOfLock);
+
+  // Updated by RemoteTextureMap
+  //
+  // Hold compositable ref of remote texture's TextureHost that is used for
+  // building WebRender display list. In sync mode, it is TextureHost of
+  // mTextureId. In async mode, it could be previous TextureHost that is
+  // compatible to the mTextureId's TextureHost.
+  CompositableTextureHostRef mRemoteTextureForDisplayList;
+
+  bool mIsSyncMode = true;
+
+  friend class RemoteTextureMap;
+};
+
+}  // namespace mozilla::layers
+
+#endif  // MOZILLA_GFX_RemoteTextureHostWrapper_H