Mojo Example that demos the difference between providing and requesting an interface

examples/indirect_service/BUILD.gn

+# Copyright 2014 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/mojo_application.gni")
+import("//mojo/public/tools/bindings/mojom.gni")
+
+group("indirect_service") {
+  deps = [
+    ":indirect_service_demo",
+    ":indirect_integer_service",
+    ":integer_service",
+  ]
+}
+
+mojo_native_application("indirect_service_demo") {
+  output_name = "indirect_service_demo"
+
+  sources = [ "indirect_service_demo.cc" ]
+
+  deps = [
+    ":bindings",
+    "//base",
+    "//mojo/application",
+    "//mojo/common",
+    "//mojo/environment:chromium",
+    "//mojo/public/c/system:for_shared_library",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/utility",
+  ]
+}
+
+mojo_native_application("integer_service") {
+  output_name = "integer_service"
+
+  sources = [ "integer_service.cc" ]
+
+  deps = [
+    ":bindings",
+    "//mojo/public/c/system:for_shared_library",
+    "//mojo/public/cpp/application:standalone",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/utility",
+  ]
+}
+
+mojo_native_application("indirect_integer_service") {
+  output_name = "indirect_integer_service"
+
+  sources = [ "indirect_integer_service.cc" ]
+
+  deps = [
+    ":bindings",
+    "//mojo/public/c/system:for_shared_library",
+    "//mojo/public/cpp/application:standalone",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/utility",
+  ]
+}
+
+mojom("bindings") {
+  sources = [ "indirect_service_demo.mojom" ]
+}