Host fingerprint mojo service within the device service.

services/device/fingerprint/BUILD.gn

+# 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("//build/config/features.gni")
+
+component("fingerprint") {
+  visibility = [ "//services/device/*" ]
+
+  sources = [
+    "fingerprint.h",
+    "fingerprint_export.h",
+    "fingerprint_impl_chromeos.cc",
+    "fingerprint_impl_chromeos.h",
+    "fingerprint_impl_default.cc",
+    "fingerprint_impl_default.h",
+  ]
+
+  defines = [ "SERVICES_DEVICE_FINGERPRINT_IMPLEMENTATION" ]
+
+  deps = [
+    "//base",
+    "//mojo/public/cpp/bindings",
+  ]
+
+  if (is_chromeos) {
+    sources -= [
+      "fingerprint_impl_default.cc",
+      "fingerprint_impl_default.h",
+    ]
+    deps += [
+      "//chromeos",
+      "//dbus",
+    ]
+  }
+
+  public_deps = [
+    "//services/device/public/interfaces",
+  ]
+}