Start building core_services.mojo.

components/clipboard/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("//third_party/mojo/src/mojo/public/mojo_application.gni")
 
-mojo_native_application("clipboard") {
+source_set("lib") {
   sources = [
     "clipboard_standalone_impl.cc",
     "clipboard_standalone_impl.h",
+  ]
+
+  deps = [
+    "//components/clipboard/public/interfaces",
+  ]
+}
+
+mojo_native_application("clipboard") {
+  sources = [
     "main.cc",
   ]
 
   deps = [
+    ":lib",
     "//base",
-    "//components/clipboard/public/interfaces",
     "//mojo/application",
     "//mojo/common",
     "//mojo/environment:chromium",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
     "//third_party/mojo/src/mojo/public/cpp/bindings:callback",
   ]
 }
 
 mojo_native_application("apptests") {
   output_name = "clipboard_apptests"
 
   testonly = true
 
   sources = [
     "clipboard_apptest.cc",
   ]
 
   deps = [
     "//base",
     "//components/clipboard/public/interfaces",
     "//mojo/application",
     "//mojo/application:test_support",
     "//mojo/common",
     "//third_party/mojo/src/mojo/public/cpp/bindings",
   ]
 
   data_deps = [ ":clipboard($default_toolchain)" ]
 }