diff -r 000000000000 -r 6474c204b198 gfx/layers/ipc/ShadowLayersManager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/layers/ipc/ShadowLayersManager.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set sw=4 ts=8 et 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_layers_ShadowLayersManager_h
+#define mozilla_layers_ShadowLayersManager_h
+
+namespace mozilla {
+namespace layers {
+
+class TargetConfig;
+class LayerTransactionParent;
+class AsyncCompositionManager;
+
+class ShadowLayersManager
+{
+public:
+    virtual void ShadowLayersUpdated(LayerTransactionParent* aLayerTree,
+                                     const TargetConfig& aTargetConfig,
+                                     bool aIsFirstPaint,
+                                     bool aScheduleComposite) = 0;
+
+    virtual AsyncCompositionManager* GetCompositionManager(LayerTransactionParent* aLayerTree) { return nullptr; }
+
+    virtual void ForceComposite(LayerTransactionParent* aLayerTree) { }
+    virtual bool SetTestSampleTime(LayerTransactionParent* aLayerTree,
+                                   const TimeStamp& aTime) { return true; }
+    virtual void LeaveTestMode(LayerTransactionParent* aLayerTree) { }
+};
+
+} // layers
+} // mozilla
+
+#endif // mozilla_layers_ShadowLayersManager_h