Remove all remaining traces of MessageLoopProxy.

chrome/browser/safe_browsing/sandboxed_zip_analyzer.cc

 // Copyright (c) 2012 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_zip_analyzer.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 104 matching lines @@
     IPC_MESSAGE_HANDLER(
         ChromeUtilityHostMsg_AnalyzeZipFileForDownloadProtection_Finished,
         OnAnalyzeZipFileFinished)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void SandboxedZipAnalyzer::StartProcessOnIOThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  utility_process_host_ = content::UtilityProcessHost::Create(
-      this,
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO).get())
-      ->AsWeakPtr();
+  utility_process_host_ =
+      content::UtilityProcessHost::Create(
+          this, BrowserThread::GetTaskRunnerForThread(BrowserThread::IO).get())
+          ->AsWeakPtr();
   utility_process_host_->SetName(l10n_util::GetStringUTF16(
       IDS_UTILITY_PROCESS_SAFE_BROWSING_ZIP_FILE_ANALYZER_NAME));
   utility_process_host_->Send(
       new ChromeUtilityMsg_AnalyzeZipFileForDownloadProtection(
           IPC::TakePlatformFileForTransit(std::move(zip_file_)),
           IPC::GetPlatformFileForTransit(temp_file_.GetPlatformFile(),
                                          false /* !close_source_handle */)));
 }
 
 void SandboxedZipAnalyzer::OnAnalyzeZipFileFinished(
     const zip_analyzer::Results& results) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (callback_called_)
     return;
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(callback_, results));
   callback_called_ = true;
   CloseTemporaryFile();
 }
 
 }  // namespace safe_browsing