Add navigation client lib for convenience

services/navigation/BUILD.gn

 # 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/mojo_application.gni")
 import("//mojo/public/mojo_application_manifest.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 group("all") {
@@ skipping 62 matching lines @@
 }
 
 test("navigation_unittests") {
   sources = [
     "navigation_unittest.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
+    "//services/navigation/public/cpp",
     "//services/navigation/public/interfaces",
     "//services/shell/public/cpp",
     "//services/shell/public/cpp:shell_test_support",
     "//services/shell/public/cpp/test:run_all_shelltests",
     "//testing/gtest",
   ]
 
   data_deps = [
     ":navigation",
     ":unittest_manifest",
@@ skipping 41 matching lines @@
     "//net:net_resources",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:resources",
     "//ui/resources",
     "//ui/strings",
     "//ui/views/resources",
   ]
 
   output = "$root_out_dir/navigation.pak"
 }