service_manager: More consistent Service lifecycle API

services/image_decoder/image_decoder_service.cc

 // Copyright 2016 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/image_decoder/image_decoder_service.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
@@ skipping 44 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(&OnImageDecoderRequest, ref_factory_.get()));
   return true;
 }
 
-bool ImageDecoderService::OnStop() {
-  return true;
-}
-
 void ImageDecoderService::MaybeRequestQuitDelayed() {
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&ImageDecoderService::MaybeRequestQuit,
                  weak_factory_.GetWeakPtr()),
       base::TimeDelta::FromSeconds(5));
 }
 
 void ImageDecoderService::MaybeRequestQuit() {
   DCHECK(ref_factory_);
   if (ref_factory_->HasNoRefs())
     context()->RequestQuit();
 }
 
 }  // namespace image_decoder