Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/background_sync/background_sync_network_observer.cc

 // Copyright 2015 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 "content/browser/background_sync/background_sync_network_observer.h"
 
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace content {
 
 BackgroundSyncNetworkObserver::BackgroundSyncNetworkObserver(
     const base::Closure& network_changed_callback)
     : connection_type_(net::NetworkChangeNotifier::GetConnectionType()),
       network_changed_callback_(network_changed_callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
@@ skipping 23 matching lines @@
       return connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE;
   }
 
   NOTREACHED();
   return false;
 }
 
 void BackgroundSyncNetworkObserver::NotifyNetworkChanged() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
-  base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
-                                                network_changed_callback_);
+  base::MessageLoop::current()->PostTask(FROM_HERE, network_changed_callback_);
 }
 
 void BackgroundSyncNetworkObserver::OnNetworkChanged(
     net::NetworkChangeNotifier::ConnectionType connection_type) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   if (connection_type == connection_type_)
     return;
 
   connection_type_ = connection_type;
   NotifyNetworkChanged();
 }
 
 }  // namespace content