cros: Remaining interfaces for DBUS biometrics client.

chromeos/dbus/biod_record_client.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 CHROMEOS_DBUS_BIOD_RECORD_CLIENT_H_
+#define CHROMEOS_DBUS_BIOD_RECORD_CLIENT_H_
+
+#include <stdint.h>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chromeos/chromeos_export.h"
+#include "chromeos/dbus/dbus_client.h"
+#include "chromeos/dbus/dbus_client_implementation_type.h"
+#include "chromeos/dbus/dbus_method_call_status.h"
+
+namespace chromeos {
+
+// BiodRecordClient is used to communicate with a biod record via dbus
+// interface.
+class CHROMEOS_EXPORT BiodRecordClient : public DBusClient {
+ public:
+  ~BiodRecordClient() override;
+
+  using StringCallback = base::Callback<void(const std::string&)>;
+
+  // Changes the label of the record at |record_path| to |label|.
+  virtual void SetLabel(const dbus::ObjectPath& record_path,
+                        const std::string& label) = 0;
+
+  // Removes the record at |record_path|. This record will no longer be able to
+  // used for authentication.
+  virtual void Remove(const dbus::ObjectPath& record_path) = 0;
+
+  // Fetches the label of the enrollment at |record_path| and runs the
+  // callback |callback| with the label as an argument.
+  virtual void GetLabel(const dbus::ObjectPath& record_path,
+                        const StringCallback& callback) = 0;
+
+  // Same as above but returns the label instead of running a callback
+  // function. This is a BLOCKING CALL.

[rkc, 2017/03/20 23:47:09]

Why is this a blocking call?
Also nit: no need for caps.

[sammiequon, 2017/03/21 00:30:39]

This is a version of the previous function in case someone wants to the label
without binding a callback.

+  virtual std::string GetLabelBlocking(const dbus::ObjectPath& record_path) = 0;
+
+  // Creates the instance.
+  static BiodRecordClient* Create(DBusClientImplementationType type);
+
+ protected:
+  friend class BiodBiometricsManagerClientTest;
+
+  // Create() should be used instead.
+  BiodRecordClient();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BiodRecordClient);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DBUS_BIOD_RECORD_CLIENT_H_