Use TabLoader in TabRestoreService.

components/sessions/content/content_live_tab.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 "components/sessions/content/content_live_tab.h"
 
 #include "base/memory/ptr_util.h"
 #include "components/sessions/content/content_platform_specific_tab_data.h"
 
 namespace {
@@ skipping 44 matching lines @@
 int ContentLiveTab::GetEntryCount() {
   return navigation_controller().GetEntryCount();
 }
 
 std::unique_ptr<sessions::PlatformSpecificTabData>
 ContentLiveTab::GetPlatformSpecificTabData() {
   return base::MakeUnique<sessions::ContentPlatformSpecificTabData>(
       web_contents());
 }
 
-void ContentLiveTab::LoadIfNecessary() {
-  navigation_controller().LoadIfNecessary();
-}
-
 const std::string& ContentLiveTab::GetUserAgentOverride() const {
   return web_contents()->GetUserAgentOverride();
 }
 
 }  // namespace sessions