Revert of Change the update_client task runner behavior to continue on shutdown.

components/component_updater/component_updater_service.cc

 // Copyright 2014 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 "components/component_updater/component_updater_service.h"
 
 #include <algorithm>
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 71 matching lines @@
       base::TimeDelta::FromSeconds(config_->NextCheckDelay()),
       base::Bind(base::IgnoreResult(&CrxUpdateService::CheckForUpdates),
                  base::Unretained(this)));
 }
 
 // Stops the update loop. In flight operations will be completed.
 void CrxUpdateService::Stop() {
   DCHECK(thread_checker_.CalledOnValidThread());
   VLOG(1) << "CrxUpdateService stopping";
   timer_.Stop();
-  update_client_->Stop();
 }
 
 // Adds a component to be checked for upgrades. If the component exists it
 // it will be replaced.
 bool CrxUpdateService::RegisterComponent(const CrxComponent& component) {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (component.pk_hash.empty() || !component.version.IsValid() ||
       !component.installer) {
     return false;
   }
@@ skipping 246 matching lines @@
 // TODO(sorin): consider making this a singleton.
 scoped_ptr<ComponentUpdateService> ComponentUpdateServiceFactory(
     const scoped_refptr<Configurator>& config) {
   DCHECK(config);
   auto update_client = update_client::UpdateClientFactory(config);
   return scoped_ptr<ComponentUpdateService>(
       new CrxUpdateService(config, update_client.Pass()));
 }
 
 }  // namespace component_updater