service_manager: More consistent Service lifecycle API

services/shape_detection/shape_detection_service.cc

 // 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.
 
 #include "services/shape_detection/shape_detection_service.h"
 
 #include "base/macros.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
 #include "services/service_manager/public/cpp/service_context.h"
 #include "services/shape_detection/barcode_detection_impl.h"
@@ skipping 30 matching lines @@
   // InterfaceRegistry's connection.
   std::unique_ptr<service_manager::ServiceContextRef> connection_ref =
       ref_factory_->CreateRef();
   registry->AddConnectionLostClosure(
       base::Bind(&OnConnectionLost, base::Passed(&connection_ref)));
   registry->AddInterface(base::Bind(&BarcodeDetectionImpl::Create));
   registry->AddInterface(base::Bind(&FaceDetectionProviderImpl::Create));
   return true;
 }
 
-bool ShapeDetectionService::OnStop() {
-  return true;
-}
-
 }  // namespace shape_detection