Host fingerprint mojo service within the device service.

services/device/fingerprint/fingerprint.h

+// 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.
+
+#ifndef SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_H_
+#define SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_H_
+
+#include "services/device/fingerprint/fingerprint_export.h"
+#include "services/device/public/interfaces/fingerprint.mojom.h"
+
+namespace device {
+
+class Fingerprint {
+ public:
+  // This function is implemented in platform-specific subclasses.
+  SERVICES_DEVICE_FINGERPRINT_EXPORT static void Create(
+      device::mojom::FingerprintRequest request);
+};
+
+}  // namespace device
+
+#endif  // SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_H_