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

components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc

Index: components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc
diff --git a/components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc b/components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc
index 393cfe0b29e179026ad34487d00bb5e9f5ba2b05..406a5946099c2cc2b5007393fe318a1001a31c19 100644
--- a/components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc
+++ b/components/proximity_auth/cryptauth/cryptauth_enroller_impl.cc
@@ -54,8 +54,8 @@ std::string CreateEnrollmentPublicMetadata() {
 }  // namespace
 
 CryptAuthEnrollerImpl::CryptAuthEnrollerImpl(
-    scoped_ptr<CryptAuthClientFactory> client_factory,
-    scoped_ptr<SecureMessageDelegate> secure_message_delegate)
+    std::unique_ptr<CryptAuthClientFactory> client_factory,
+    std::unique_ptr<SecureMessageDelegate> secure_message_delegate)
     : client_factory_(std::move(client_factory)),
       secure_message_delegate_(std::move(secure_message_delegate)),
       weak_ptr_factory_(this) {}