Convert utility process extension Unpacker IPC to mojo

chrome/utility/chrome_content_utility_client.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/utility/chrome_content_utility_client.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 148 matching lines @@
 
 #if defined(OS_WIN)
   handlers_.push_back(new IPCShellHandler());
 #endif
 }
 
 ChromeContentUtilityClient::~ChromeContentUtilityClient() = default;
 
 void ChromeContentUtilityClient::UtilityThreadStarted() {
 #if BUILDFLAG(ENABLE_EXTENSIONS)
-  extensions::UtilityHandler::UtilityThreadStarted();
+  extensions::ExtensionsHandler::UtilityThreadStarted();
 #endif
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kUtilityProcessRunningElevated))
     utility_process_running_elevated_ = true;
 }
 
 bool ChromeContentUtilityClient::OnMessageReceived(
     const IPC::Message& message) {
   if (utility_process_running_elevated_)
@@ skipping 116 matching lines @@
   safe_browsing::zip_analyzer::Results results;
   safe_browsing::dmg::AnalyzeDMGFile(
       IPC::PlatformFileForTransitToFile(dmg_file), &results);
   Send(new ChromeUtilityHostMsg_AnalyzeDmgFileForDownloadProtection_Finished(
       results));
   ReleaseProcessIfNeeded();
 }
 #endif  // defined(OS_MACOSX)
 
 #endif  // defined(FULL_SAFE_BROWSING)