memory-infra: Introduce mojo interfaces and service stubs

services/memory_instrumentation/public/interfaces/BUILD.gn

Index: services/memory_instrumentation/public/interfaces/BUILD.gn
diff --git a/services/memory_instrumentation/public/interfaces/BUILD.gn b/services/memory_instrumentation/public/interfaces/BUILD.gn
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index 0000000000000000000000000000000000000000..b9c940dc047163a8d2ef51b0f660e62098fc0584
--- /dev/null
+++ b/services/memory_instrumentation/public/interfaces/BUILD.gn
@@ -0,0 +1,11 @@
+# Copyright 2017 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 = [
+    "memory_instrumentation.mojom",
+  ]
+}