chrome/browser: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

chrome/browser/infobars/infobar_responder.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 "chrome/browser/infobars/infobar_responder.h"
 
 #include "base/bind.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/infobars/core/infobar.h"
 
 InfoBarResponder::InfoBarResponder(InfoBarService* infobar_service,
                                    AutoResponseType response)
     : infobar_service_(infobar_service), response_(response) {
   infobar_service_->AddObserver(this);
 }
 
 InfoBarResponder::~InfoBarResponder() {
   // This is safe even if we were already removed as an observer in
   // OnInfoBarAdded().
   infobar_service_->RemoveObserver(this);
 }
 
 void InfoBarResponder::OnInfoBarAdded(infobars::InfoBar* infobar) {
   infobar_service_->RemoveObserver(this);
   ConfirmInfoBarDelegate* delegate =
       infobar->delegate()->AsConfirmInfoBarDelegate();
   DCHECK(delegate);
 
-  base::MessageLoop::current()->PostTask(
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&InfoBarResponder::Respond, base::Unretained(this), delegate));
 }
 
 void InfoBarResponder::OnInfoBarReplaced(infobars::InfoBar* old_infobar,
                                          infobars::InfoBar* new_infobar) {
   OnInfoBarAdded(new_infobar);
 }
 
 void InfoBarResponder::Respond(ConfirmInfoBarDelegate* delegate) {
   switch (response_) {
     case ACCEPT:
       delegate->Accept();
       break;
     case DENY:
       delegate->Cancel();
       break;
     case DISMISS:
       delegate->InfoBarDismissed();
       break;
   }
 }