Remove all remaining traces of MessageLoopProxy.

chrome/browser/local_discovery/service_discovery_client_mdns.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 "chrome/browser/local_discovery/service_discovery_client_mdns.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 308 matching lines @@
     PostToUIThread(base::Bind(&Base::RunCallback, proxy,
                               base::Bind(callback, a1, a2, a3)));
   }
 
   DISALLOW_COPY_AND_ASSIGN(LocalDomainResolverProxy);
 };
 
 }  // namespace
 
 ServiceDiscoveryClientMdns::ServiceDiscoveryClientMdns()
-    : mdns_runner_(
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO)),
+    : mdns_runner_(BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)),
       restart_attempts_(0),
       need_dalay_mdns_tasks_(true),
       weak_ptr_factory_(this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
   StartNewClient();
 }
 
 std::unique_ptr<ServiceWatcher>
 ServiceDiscoveryClientMdns::CreateServiceWatcher(
@@ skipping 105 matching lines @@
   OnBeforeMdnsDestroy();
   // After calling |Proxy::OnMdnsDestroy| all references to client_ and mdns_
   // should be destroyed.
   if (client_)
     mdns_runner_->DeleteSoon(FROM_HERE, client_.release());
   if (mdns_)
     mdns_runner_->DeleteSoon(FROM_HERE, mdns_.release());
 }
 
 }  // namespace local_discovery