Remove all remaining traces of MessageLoopProxy.

chrome/browser/safe_browsing/sandboxed_dmg_analyzer_mac.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/safe_browsing/sandboxed_dmg_analyzer_mac.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "chrome/common/chrome_utility_messages.h"
@@ skipping 41 matching lines @@
 
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(&SandboxedDMGAnalyzer::StartAnalysis,
                                      this));
 }
 
 void SandboxedDMGAnalyzer::StartAnalysis() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   content::UtilityProcessHost* utility_process_host =
-      content::UtilityProcessHost::Create(this,
-          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
+      content::UtilityProcessHost::Create(
+          this, BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
 
   utility_process_host->SetName(l10n_util::GetStringUTF16(
       IDS_UTILITY_PROCESS_SAFE_BROWSING_ZIP_FILE_ANALYZER_NAME));
   utility_process_host->Send(
       new ChromeUtilityMsg_AnalyzeDmgFileForDownloadProtection(
           IPC::TakePlatformFileForTransit(std::move(file_))));
 }
 
 void SandboxedDMGAnalyzer::OnProcessCrashed(int exit_code) {
   OnAnalysisFinished(zip_analyzer::Results());
@@ skipping 19 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (callback_called_)
     return;
 
   callback_called_ = true;
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(callback_, results));
 }
 
 }  // namespace safe_browsing