Test service as minimum repro for sharing memory handle

services/test/public/interfaces/service.mojom

Index: services/test/public/interfaces/service.mojom
diff --git a/services/test/public/interfaces/service.mojom b/services/test/public/interfaces/service.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..12b2d6f8ddcb080aa67496a249346314dd61844f
--- /dev/null
+++ b/services/test/public/interfaces/service.mojom
@@ -0,0 +1,13 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+module test.mojom;
+
+interface Receiver {
+  ReceiveBufferHandle(handle<shared_buffer> buffer_handle);
+};
+
+interface Service {
+  ShareBufferToTestReceiver(Receiver receiver);
+};