Host fingerprint mojo service within the device service.

services/device/fingerprint/fingerprint_impl.h

Index: services/device/fingerprint/fingerprint_impl.h
diff --git a/services/device/fingerprint/fingerprint_impl.h b/services/device/fingerprint/fingerprint_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..9e5d9f56c96f1b07ad2bc088e6d83417e1299298
--- /dev/null
+++ b/services/device/fingerprint/fingerprint_impl.h
@@ -0,0 +1,21 @@
+// 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_IMPL_H_
+#define SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_IMPL_H_
+
+#include "services/device/fingerprint/fingerprint_export.h"
+#include "services/device/public/interfaces/fingerprint.mojom.h"
+
+namespace device {
+
+class FingerprintImpl {

[blundell, 2017/02/06 14:52:43]

nit: This class can be called Fingerprint (that's one of the reasons the nested
mojom namespace was introduced for generated code).

[xiaoyinh(OOO Sep 11-29), 2017/02/22 00:04:50]

Done.

+ public:
+  SERVICES_DEVICE_FINGERPRINT_EXPORT static void Create(

[blundell, 2017/02/06 14:52:43]

nit: A comment would be useful here. ("Implemented in platform-specific
subclasses").

[xiaoyinh(OOO Sep 11-29), 2017/02/22 00:04:50]

Done.

+      device::mojom::FingerprintRequest request);
+};
+
+}  // namespace device
+
+#endif  // SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_IMPL_H_