Enable moving of credentials in HttpPasswordMigrator

components/password_manager/core/browser/credential_manager_pending_request_task.cc

Index: components/password_manager/core/browser/credential_manager_pending_request_task.cc
diff --git a/components/password_manager/core/browser/credential_manager_pending_request_task.cc b/components/password_manager/core/browser/credential_manager_pending_request_task.cc
index fc1061fa758b7cd9d3e6dccfd30effb8a017caf9..63c79bb0a5c1991f5cd2c98e7263994ed10f0f59 100644
--- a/components/password_manager/core/browser/credential_manager_pending_request_task.cc
+++ b/components/password_manager/core/browser/credential_manager_pending_request_task.cc
@@ -134,7 +134,8 @@ void CredentialManagerPendingRequestTask::OnGetPasswordStoreResults(
   if (results.empty()) {
     // Try to migrate the HTTP passwords and process them later.
     http_migrator_ = base::MakeUnique<HttpPasswordMigrator>(
-        origin_, delegate_->client()->GetPasswordStore(), this);
+        origin_, HttpPasswordMigrator::MigrationMode::COPY,
+        delegate_->client()->GetPasswordStore(), this);
     return;
   }
   ProcessForms(std::move(results));