Modify U2F apdu classes to use unique pointers

device/u2f/u2f_device.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 DEVICE_U2F_U2F_DEVICE_H_
 #define DEVICE_U2F_U2F_DEVICE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 13 matching lines @@
     UNKNOWN,
   };
   enum class ReturnCode { SUCCESS, HW_FAILURE, INVALID_PARAMS };
 
   using MessageCallback =
       base::Callback<void(ReturnCode, std::vector<uint8_t>)>;
   using VersionCallback =
       base::Callback<void(bool success, ProtocolVersion version)>;
   using DeviceCallback =
       base::Callback<void(bool success,
-                          scoped_refptr<U2fApduResponse> response)>;
+                          std::unique_ptr<U2fApduResponse> response)>;
 
   ~U2fDevice();
 
   // Raw messages parameters are defined by the specification at
   // https://fidoalliance.org/specs/fido-u2f-v1.0-nfc-bt-amendment-20150514/fido-u2f-raw-message-formats.html
   void Register(const std::vector<uint8_t>& appid_digest,
                 const ProtocolVersion version,
                 const std::vector<uint8_t>& challenge_digest,
                 const MessageCallback& callback);
   void Version(const VersionCallback& callback);
   void Sign(const std::vector<uint8_t>& appid_digest,
             const std::vector<uint8_t>& challenge_digest,
             const std::vector<uint8_t>& key_handle,
             const MessageCallback& callback);
 
  protected:
   U2fDevice();
 
   // Pure virtual function defined by each device type, implementing
   // the device communication transaction.
-  virtual void DeviceTransact(scoped_refptr<U2fApduCommand> command,
+  virtual void DeviceTransact(std::unique_ptr<U2fApduCommand> command,
                               const DeviceCallback& callback) = 0;
 
  private:
   // TODO Callback functions for device calls
   void OnRegisterComplete(const MessageCallback& callback,
                           bool success,
-                          scoped_refptr<U2fApduResponse> register_response);
+                          std::unique_ptr<U2fApduResponse> register_response);
   void OnSignComplete(const MessageCallback& callback,
                       bool success,
-                      scoped_refptr<U2fApduResponse> sign_response);
+                      std::unique_ptr<U2fApduResponse> sign_response);
   void OnVersionComplete(const VersionCallback& callback,
                          bool success,
-                         scoped_refptr<U2fApduResponse> version_response);
+                         std::unique_ptr<U2fApduResponse> version_response);
   void OnLegacyVersionComplete(
       const VersionCallback& callback,
       bool success,
-      scoped_refptr<U2fApduResponse> legacy_version_response);
+      std::unique_ptr<U2fApduResponse> legacy_version_response);
 
   base::WeakPtrFactory<U2fDevice> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(U2fDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_U2F_U2F_DEVICE_H_