1 files changed, 24 insertions, 0 deletions
diff --git a/gfx/config/gfxVarReceiver.h b/gfx/config/gfxVarReceiver.h
new file mode 100644
index 0000000000..ab026f2eb6
--- /dev/null
+++ b/gfx/config/gfxVarReceiver.h
@@ -0,0 +1,24 @@
+/* -*- 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_config_gfxVarReceiver_h
+#define mozilla_gfx_config_gfxVarReceiver_h
+
+namespace mozilla {
+namespace gfx {
+
+class GfxVarUpdate;
+
+// This allows downstream processes (such as PContent, PGPU) to listen for
+// updates on gfxVarReceiver.
+class gfxVarReceiver {
+ public:
+  virtual void OnVarChanged(const GfxVarUpdate& aVar) = 0;
+};
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif  // mozilla_gfx_config_gfxVarReceiver_h