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diff --git a/layout/ipc/RemoteLayerTreeOwner.h b/layout/ipc/RemoteLayerTreeOwner.h
new file mode 100644
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+++ b/layout/ipc/RemoteLayerTreeOwner.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_layout_RemoteLayerTreeOwner_h
+#define mozilla_layout_RemoteLayerTreeOwner_h
+
+#include "base/process.h"
+
+#include "mozilla/Attributes.h"
+
+#include "mozilla/dom/ipc/IdType.h"
+#include "mozilla/layers/CompositorOptions.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "nsDisplayList.h"
+
+class nsFrameLoader;
+class nsSubDocumentFrame;
+
+namespace mozilla {
+
+namespace dom {
+class BrowserParent;
+}  // namespace dom
+
+namespace layers {
+struct TextureFactoryIdentifier;
+}  // namespace layers
+
+namespace layout {
+
+/**
+ * RemoteLayerTreeOwner connects and manages layer trees for remote frames. It
+ * is directly owned by a BrowserParent and always lives in the parent process.
+ */
+class RemoteLayerTreeOwner final {
+  typedef mozilla::layers::CompositorOptions CompositorOptions;
+  typedef mozilla::layers::LayerManager LayerManager;
+  typedef mozilla::layers::LayersId LayersId;
+  typedef mozilla::layers::TextureFactoryIdentifier TextureFactoryIdentifier;
+
+ public:
+  RemoteLayerTreeOwner();
+  virtual ~RemoteLayerTreeOwner();
+
+  bool Initialize(dom::BrowserParent* aBrowserParent);
+  void Destroy();
+
+  void EnsureLayersConnected(CompositorOptions* aCompositorOptions);
+  bool AttachWindowRenderer();
+  void OwnerContentChanged();
+
+  LayersId GetLayersId() const { return mLayersId; }
+  CompositorOptions GetCompositorOptions() const { return mCompositorOptions; }
+
+  void GetTextureFactoryIdentifier(
+      TextureFactoryIdentifier* aTextureFactoryIdentifier) const;
+
+  bool IsInitialized() const { return mInitialized; }
+  bool IsLayersConnected() const { return mLayersConnected; }
+
+ private:
+  // The process id of the remote frame. This is used by the compositor to
+  // do security checks on incoming layer transactions.
+  base::ProcessId mTabProcessId;
+  // The layers id of the remote frame.
+  LayersId mLayersId;
+  // The compositor options for this layers id. This is only meaningful if
+  // the compositor actually knows about this layers id (i.e. when
+  // mLayersConnected is true).
+  CompositorOptions mCompositorOptions;
+
+  dom::BrowserParent* mBrowserParent;
+  RefPtr<WindowRenderer> mWindowRenderer;
+
+  bool mInitialized;
+  // A flag that indicates whether or not the compositor knows about the
+  // layers id. In some cases this RemoteLayerTreeOwner is not connected to the
+  // compositor and so this flag is false.
+  bool mLayersConnected;
+};
+
+}  // namespace layout
+}  // namespace mozilla
+
+#endif  // mozilla_layout_RemoteLayerTreeOwner_h