Convert utility process extension Unpacker IPC to mojo

chrome/utility/extensions/extensions_handler.cc

 // 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.
 
 #include "chrome/utility/extensions/extensions_handler.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 158 matching lines @@
 #endif  // defined(OS_WIN)
 
 }  // namespace
 
 namespace extensions {
 
 ExtensionsHandler::ExtensionsHandler() {
   ExtensionsClient::Set(ChromeExtensionsClient::GetInstance());
 }
 
-ExtensionsHandler::~ExtensionsHandler() {
-}
+ExtensionsHandler::~ExtensionsHandler() = default;
 
 // static
 void ExtensionsHandler::PreSandboxStartup() {
   // Initialize media libraries for media file validation.
   media::InitializeMediaLibrary();
 }
 
 // static
 void ExtensionsHandler::ExposeInterfacesToBrowser(
     service_manager::InterfaceRegistry* registry,
@@ skipping 91 matching lines @@
   picasa::PicasaAlbumsIndexer indexer(album_uids);
   indexer.ParseFolderINI(folders_inis);
   content::UtilityThread::Get()->Send(
       new ChromeUtilityHostMsg_IndexPicasaAlbumsContents_Finished(
           indexer.albums_images()));
   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
 }
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
 }  // namespace extensions