Test service as minimum repro for sharing memory handle

services/test/public/interfaces/BUILD.gn

Index: services/test/public/interfaces/BUILD.gn
diff --git a/services/test/public/interfaces/BUILD.gn b/services/test/public/interfaces/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..4b5a6023fdcfb0a230e52b50f36f2b0d29a6f81d
--- /dev/null
+++ b/services/test/public/interfaces/BUILD.gn
@@ -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.
+
+import("//mojo/public/tools/bindings/mojom.gni")
+
+mojom("interfaces") {
+  sources = [
+    "service.mojom",
+  ]
+
+  deps = []
+}