Remove remaining use of the deprecated MessageLoopProxy

extensions/browser/api/networking_private/networking_private_service_client.cc

 // Copyright 2013 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 "extensions/browser/api/networking_private/networking_private_service_client.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/sequenced_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
 #include "components/onc/onc_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/networking_private/networking_private_api.h"
 #include "extensions/browser/api/networking_private/networking_private_delegate_observer.h"
 
 using content::BrowserThread;
 using wifi::WiFiService;
 
 namespace extensions {
@@ skipping 29 matching lines @@
               sequence_token_, base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
   task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&WiFiService::Initialize,
                  base::Unretained(wifi_service_.get()), task_runner_));
   task_runner_->PostTask(
       FROM_HERE,
       base::Bind(
           &WiFiService::SetEventObservers,
           base::Unretained(wifi_service_.get()),
-          base::MessageLoopProxy::current(),
+          base::ThreadTaskRunnerHandle::Get(),
           base::Bind(
               &NetworkingPrivateServiceClient::OnNetworksChangedEventOnUIThread,
               weak_factory_.GetWeakPtr()),
           base::Bind(&NetworkingPrivateServiceClient::
                          OnNetworkListChangedEventOnUIThread,
                      weak_factory_.GetWeakPtr())));
   net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
 }
 
 NetworkingPrivateServiceClient::~NetworkingPrivateServiceClient() {
@@ skipping 375 matching lines @@
 
 void NetworkingPrivateServiceClient::OnNetworkListChangedEventOnUIThread(
     const std::vector<std::string>& network_guids) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   FOR_EACH_OBSERVER(NetworkingPrivateDelegateObserver,
                     network_events_observers_,
                     OnNetworkListChangedEvent(network_guids));
 }
 
 }  // namespace extensions