Host fingerprint mojo service within the device service.

services/device/fingerprint/fingerprint_impl_chromeos.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_IMPL_CHROMEOS_H_
+#define SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_IMPL_CHROMEOS_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "dbus/object_path.h"

[stevenjb, 2017/02/22 16:32:21]

You should be able to forward declare ObjectPath and move the include to the C++
file.

[xiaoyinh(OOO Sep 11-29), 2017/02/22 21:03:17]

Done.

+#include "services/device/public/interfaces/fingerprint.mojom.h"
+
+namespace device {
+
+// Implementation of Fingerprint interface for ChromeOS platform.
+// This is used to connect to biod(through dbus) and perform fingerprint related
+// operations. It will also observe signals from biod.

[blundell, 2017/02/22 15:20:06]

nit: s/will also observe/observes

[xiaoyinh(OOO Sep 11-29), 2017/02/22 21:03:17]

Done.

+class FingerprintImplChromeOS : public mojom::Fingerprint {
+ public:
+  explicit FingerprintImplChromeOS();
+  ~FingerprintImplChromeOS() override;
+
+  // mojom::Fingerprint:
+  void GetFingerprintsList(
+      const GetFingerprintsListCallback& callback) override;
+  void StartEnroll(const std::string& user_id,
+                   const std::string& label) override;
+  void CancelCurrentEnroll() override;
+  void GetLabel(int32_t index, const GetLabelCallback& callback) override;
+  void SetLabel(const std::string& label, int32_t index) override;
+  void RemoveEnrollment(int32_t index) override;
+  void StartAuthentication() override;
+  void EndCurrentAuthentication() override;
+  void DestroyAllEnrollments() override;
+  void AddBiodObserver(mojom::BiodObserverPtr observer) override;
+
+ private:
+  friend class FingerprintImplChromeOSTest;
+
+  void BiodBiometricClientRestarted();
+  void BiometricsScanEventReceived(uint32_t scan_result, bool is_complete);
+  void BiometricsAttemptEventReceived(
+      uint32_t scan_result,
+      const std::vector<std::string>& recognized_user_ids);
+  void BiometricsFailureReceived();
+
+  void OnBiodObserverDisconnected(mojom::BiodObserver* observer);
+  void OnStartEnroll(const dbus::ObjectPath& enroll_path);
+  void OnStartAuthentication(const dbus::ObjectPath& auth_path);
+  void OnGetFingerprintsList(
+      const GetFingerprintsListCallback& callback,
+      const std::vector<dbus::ObjectPath>& enrollment_paths);
+  void OnGetLabelFromEnrollmentPath(const GetFingerprintsListCallback& callback,
+                                    size_t num_enrollments,
+                                    std::vector<std::string>* out_labels,
+                                    const std::string& label);
+
+  void OnGetLabel(int32_t index,
+                  const GetLabelCallback& callback,
+                  const std::vector<dbus::ObjectPath>& enrollment_paths);
+  void OnSetLabel(const std::string& new_label,
+                  int index,
+                  const std::vector<dbus::ObjectPath>& enrollment_paths);
+  void OnRemoveEnrollment(
+      int index,
+      const std::vector<dbus::ObjectPath>& enrollment_paths);
+
+  std::vector<mojom::BiodObserverPtr> observers_;
+  std::unique_ptr<dbus::ObjectPath> current_enroll_path_;
+  std::unique_ptr<dbus::ObjectPath> current_auth_path_;
+
+  base::WeakPtrFactory<FingerprintImplChromeOS> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(FingerprintImplChromeOS);
+};
+
+}  // namespace device
+
+#endif  // SERVICES_DEVICE_FINGERPRINT_FINGERPRINT_IMPL_CHROMEOS_H_