diff -r 000000000000 -r 6474c204b198 gfx/layers/ipc/LayerTransactionChild.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/layers/ipc/LayerTransactionChild.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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_LAYERS_LAYERTRANSACTIONCHILD_H
+#define MOZILLA_LAYERS_LAYERTRANSACTIONCHILD_H
+
+#include <stdint.h>                     // for uint32_t
+#include "mozilla/Attributes.h"         // for MOZ_OVERRIDE
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/layers/PLayerTransactionChild.h"
+#include "mozilla/RefPtr.h"
+
+namespace mozilla {
+
+namespace layout {
+class RenderFrameChild;
+}
+
+namespace layers {
+
+class LayerTransactionChild : public PLayerTransactionChild
+{
+public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(LayerTransactionChild)
+  /**
+   * Clean this up, finishing with Send__delete__().
+   *
+   * It is expected (checked with an assert) that all shadow layers
+   * created by this have already been destroyed and
+   * Send__delete__()d by the time this method is called.
+   */
+  void Destroy();
+
+  bool IPCOpen() const { return mIPCOpen; }
+
+protected:
+  LayerTransactionChild()
+    : mIPCOpen(false)
+  {}
+  ~LayerTransactionChild() { }
+
+  virtual PGrallocBufferChild*
+  AllocPGrallocBufferChild(const IntSize&,
+                           const uint32_t&, const uint32_t&,
+                           MaybeMagicGrallocBufferHandle*) MOZ_OVERRIDE;
+  virtual bool
+  DeallocPGrallocBufferChild(PGrallocBufferChild* actor) MOZ_OVERRIDE;
+
+  virtual PLayerChild* AllocPLayerChild() MOZ_OVERRIDE;
+  virtual bool DeallocPLayerChild(PLayerChild* actor) MOZ_OVERRIDE;
+
+  virtual PCompositableChild* AllocPCompositableChild(const TextureInfo& aInfo) MOZ_OVERRIDE;
+  virtual bool DeallocPCompositableChild(PCompositableChild* actor) MOZ_OVERRIDE;
+
+  virtual PTextureChild* AllocPTextureChild(const SurfaceDescriptor& aSharedData,
+                                            const TextureFlags& aFlags) MOZ_OVERRIDE;
+  virtual bool DeallocPTextureChild(PTextureChild* actor) MOZ_OVERRIDE;
+
+  virtual void ActorDestroy(ActorDestroyReason why) MOZ_OVERRIDE;
+
+  void AddIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == false);
+    mIPCOpen = true;
+    AddRef();
+  }
+  void ReleaseIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == true);
+    mIPCOpen = false;
+    Release();
+  }
+  friend class CompositorChild;
+  friend class layout::RenderFrameChild;
+
+  bool mIPCOpen;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // MOZILLA_LAYERS_LAYERTRANSACTIONCHILD_H