use Symfony\Component\HttpFoundation\Request;
//...
        // 独自コントローラー
        //...
        $front->match('/abc', function(Request $request) use ($app) {
                $subRequest = Request::create(
                        '/',
                        $request->getMethod(),
                        $request->request->all(),
                        $request->cookies->all(),
                        $request->files->all(),
                        $request->server->all()
                );
                $response = $app->handle($subRequest, HttpKernelInterface::SUB_REQUEST, false);
                return $response;
        })->bind('abc_alias');       

        $front->match('/abc', function(Request $request) use ($app) {
                $subRequest = Request::create(
                        '/',
                        $request->getMethod(),
                        $request->request->all(),
                        $request->cookies->all(),
                        $request->files->all(),
                        $request->server->all()
                );

                $route = 'homepage';

                try {
                    $DeviceType = $app['eccube.repository.master.device_type']
                        ->find(\Eccube\Entity\Master\DeviceType::DEVICE_TYPE_PC);
                    $PageLayout = $app['eccube.repository.page_layout']->getByUrl($DeviceType, $route);
                } catch (\Doctrine\ORM\NoResultException $e) {
                    $PageLayout = $app['eccube.repository.page_layout']->newPageLayout($DeviceType);
                }

                $app['twig']->addGlobal('PageLayout', $PageLayout);
                $app['twig']->addGlobal('title', $PageLayout->getName());

                $response = $app->handle($subRequest, HttpKernelInterface::SUB_REQUEST, false);
                return $response;
        })->bind('abc_alias');