Host fingerprint mojo service within the device service.

services/device/fingerprint/fingerprint_impl_default.cc

+// 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.
+
+#include "services/device/fingerprint/fingerprint.h"
+#include "services/device/public/interfaces/fingerprint.mojom.h"
+
+namespace device {
+
+namespace {
+
+// An empty implementation of Fingerprint.
+// Used on platforms where a real implementation is not available.
+class FingerprintImplDefault : public Fingerprint {
+ public:
+  explicit FingerprintImplDefault() {}
+  ~FingerprintImplDefault() {}
+};
+
+}  // namespace
+
+// static
+void Fingerprint::Create(device::mojom::FingerprintRequest request) {
+  // Do nothing.
+}
+
+}  // namespace device