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diff --git a/gfx/layers/mlgpu/ContainerLayerMLGPU.h b/gfx/layers/mlgpu/ContainerLayerMLGPU.h
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+++ b/gfx/layers/mlgpu/ContainerLayerMLGPU.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_layers_mlgpu_ContainerLayerMLGPU_h
+#define mozilla_gfx_layers_mlgpu_ContainerLayerMLGPU_h
+
+#include "LayerMLGPU.h"
+#include "MLGDeviceTypes.h"
+
+namespace mozilla {
+namespace layers {
+
+class MLGDevice;
+class RenderViewMLGPU;
+
+class ContainerLayerMLGPU final : public ContainerLayer, public LayerMLGPU {
+ public:
+  explicit ContainerLayerMLGPU(LayerManagerMLGPU* aManager);
+  virtual ~ContainerLayerMLGPU();
+
+  MOZ_LAYER_DECL_NAME("ContainerLayerMLGPU", TYPE_CONTAINER)
+
+  HostLayer* AsHostLayer() override { return this; }
+  ContainerLayerMLGPU* AsContainerLayerMLGPU() override { return this; }
+  Layer* GetLayer() override { return this; }
+
+  void ComputeEffectiveTransforms(
+      const gfx::Matrix4x4& aTransformToSurface) override {
+    DefaultComputeEffectiveTransforms(aTransformToSurface);
+  }
+  void SetInvalidCompositeRect(const gfx::IntRect* aRect) override;
+  void ClearCachedResources() override;
+
+  const LayerIntRegion& GetShadowVisibleRegion() override;
+
+  RefPtr<MLGRenderTarget> UpdateRenderTarget(MLGDevice* aDevice,
+                                             MLGRenderTargetFlags aFlags);
+
+  MLGRenderTarget* GetRenderTarget() const { return mRenderTarget; }
+  gfx::IntPoint GetTargetOffset() const { return mTargetOffset; }
+  gfx::IntSize GetTargetSize() const { return mTargetSize; }
+  const gfx::IntRect& GetInvalidRect() const { return mInvalidRect; }
+  void ClearInvalidRect() { mInvalidRect.SetEmpty(); }
+  bool IsContentOpaque() override;
+  bool NeedsSurfaceCopy() const { return mSurfaceCopyNeeded; }
+
+  RenderViewMLGPU* GetRenderView() const { return mView; }
+  void SetRenderView(RenderViewMLGPU* aView) {
+    MOZ_ASSERT(!mView);
+    mView = aView;
+  }
+
+  void ComputeIntermediateSurfaceBounds();
+
+  // Similar to ContainerLayerComposite, we need to include the pres shell
+  // resolution, if there is one, in the layer's post-scale.
+  float GetPostXScale() const override {
+    return mSimpleAttrs.GetPostXScale() * mPresShellResolution;
+  }
+  float GetPostYScale() const override {
+    return mSimpleAttrs.GetPostYScale() * mPresShellResolution;
+  }
+
+ protected:
+  bool OnPrepareToRender(FrameBuilder* aBuilder) override;
+  void OnLayerManagerChange(LayerManagerMLGPU* aManager) override;
+
+ private:
+  static Maybe<gfx::IntRect> FindVisibleBounds(
+      Layer* aLayer, const Maybe<RenderTargetIntRect>& aClip);
+
+  RefPtr<MLGRenderTarget> mRenderTarget;
+
+  // We cache these since occlusion culling can change the visible region.
+  gfx::IntPoint mTargetOffset;
+  gfx::IntSize mTargetSize;
+
+  // The region of the container that needs to be recomposited if visible. We
+  // store this as a rectangle instead of an nsIntRegion for efficiency. This
+  // is in layer coordinates.
+  gfx::IntRect mInvalidRect;
+  bool mInvalidateEntireSurface;
+  bool mSurfaceCopyNeeded;
+
+  // This is only valid for intermediate surfaces while an instance of
+  // FrameBuilder is live.
+  RenderViewMLGPU* mView;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // mozilla_gfx_layers_mlgpu_ContainerLayerMLGPU_h