Convert //components/proximity_auth from scoped_ptr to std::unique_ptr

components/proximity_auth/cryptauth_enroller_factory_impl.h

 // Copyright 2015 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 COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_FACTORY_IMPL_H
 #define COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_FACTORY_IMPL_H
 
 #include "base/macros.h"
 #include "components/proximity_auth/cryptauth/cryptauth_enroller.h"
 #include "components/proximity_auth/proximity_auth_client.h"
 
 namespace proximity_auth {
 
 // Implementation of CryptAuthEnrollerFactory. Note that this class is in the
 // proximity_auth/ rather than the cryptauth/ directory because of the
 // dependency on ProximityAuthClient.
 class CryptAuthEnrollerFactoryImpl : public CryptAuthEnrollerFactory {
  public:
   explicit CryptAuthEnrollerFactoryImpl(
       ProximityAuthClient* proximity_auth_client);
   ~CryptAuthEnrollerFactoryImpl() override;
 
   // CryptAuthEnrollerFactory:
-  scoped_ptr<CryptAuthEnroller> CreateInstance() override;
+  std::unique_ptr<CryptAuthEnroller> CreateInstance() override;
 
  private:
   proximity_auth::ProximityAuthClient* proximity_auth_client_;
 
   DISALLOW_COPY_AND_ASSIGN(CryptAuthEnrollerFactoryImpl);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ENROLLER_FACTORY_IMPL_H