Convert utility process extension Unpacker IPC to mojo

extensions/test/test_content_utility_client.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 "extensions/test/test_content_utility_client.h"
 
 namespace extensions {
 
-TestContentUtilityClient::TestContentUtilityClient() {
-}
+TestContentUtilityClient::TestContentUtilityClient() = default;
 
-TestContentUtilityClient::~TestContentUtilityClient() {
-}
+TestContentUtilityClient::~TestContentUtilityClient() = default;
 
 void TestContentUtilityClient::UtilityThreadStarted() {
   UtilityHandler::UtilityThreadStarted();
 }
 
+void TestContentUtilityClient::ExposeInterfacesToBrowser(
+    service_manager::InterfaceRegistry* registry) {
+  UtilityHandler::ExposeInterfacesToBrowser(registry, false);
+}
+
 bool TestContentUtilityClient::OnMessageReceived(const IPC::Message& message) {
   return utility_handler_.OnMessageReceived(message);
 }
 
-
 }  // namespace extensions