Build libraries for a number of services.

services/icu_data/BUILD.gn

 # Copyright 2015 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")
 import("//mojo/tools/embed/rules.gni")
 
 embed_file("embed_icu_data") {
   source = "$root_out_dir/icudtl.dat"
   namespace = "icu_data"
   variable = "kICUData"
 
   deps = [
     "//third_party/icu:icudata",
   ]
 }
 
 mojo_native_application("icu_data") {
   sources = [
+    "main.cc",
+  ]
+
+  deps = [
+    ":lib",
+    "//mojo/application",
+  ]
+}
+
+source_set("lib") {
+  sources = [
     "icu_data_impl.cc",
   ]
 
   deps = [
     ":embed_icu_data",
     "//base",
     "//mojo/application",
     "//mojo/common",
     "//mojo/environment:chromium",
     "//mojo/services/icu_data/interfaces",
   ]
 }