[chrome/browser/local_discovery] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

chrome/browser/local_discovery/wifi/credential_getter_win.h

 // 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.
 
 #ifndef CHROME_BROWSER_LOCAL_DISCOVERY_WIFI_CREDENTIAL_GETTER_WIN_H_
 #define CHROME_BROWSER_LOCAL_DISCOVERY_WIFI_CREDENTIAL_GETTER_WIN_H_
 
 #include <string>
 
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
 
 namespace local_discovery {
 namespace wifi {
 
 class CredentialGetterWin : public content::UtilityProcessHostClient {
  public:
   typedef base::Callback<void(bool success, const std::string& key)>
       CredentialsCallback;
@@ skipping 12 matching lines @@
   void OnProcessLaunchFailed() override;
 
   // IPC message handlers.
   void OnGotCredentials(const std::string& key_data, bool success);
 
   void StartOnIOThread(const std::string& network_guid);
 
   void PostCallback(bool success, const std::string& key_data);
 
   CredentialsCallback callback_;
-  scoped_refptr<base::MessageLoopProxy> callback_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> callback_runner_;
 };
 
 }  // namespace wifi
 }  // namespace local_discovery
 
 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_WIFI_CREDENTIAL_GETTER_WIN_H_