Use TabLoader in TabRestoreService.

chrome/browser/ui/android/tab_model/android_live_tab_context.cc

 // Copyright 2016 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/android/tab_android.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/android/tab_model/android_live_tab_context.h"
 #include "chrome/browser/ui/android/tab_model/tab_model.h"
 #include "chrome/browser/ui/android/tab_model/tab_model_list.h"
 #include "components/sessions/content/content_live_tab.h"
@@ skipping 66 matching lines @@
             navigations, profile);
 
   // Restore web contents with navigation history.
   content::WebContents* web_contents = content::WebContents::Create(
           content::WebContents::CreateParams(profile));
   web_contents->GetController().Restore(
       selected_navigation, content::RestoreType::CURRENT_SESSION, &nav_entries);
 
   // Create new tab.
   tab_model_->CreateTab(nullptr, web_contents, -1);
+  web_contents->GetController().LoadIfNecessary();
   return sessions::ContentLiveTab::GetForWebContents(web_contents);
 }
 
 // Currently does nothing.
 sessions::LiveTab* AndroidLiveTabContext::ReplaceRestoredTab(
     const std::vector<sessions::SerializedNavigationEntry>& navigations,
     int selected_navigation,
     bool from_last_session,
     const std::string& extension_app_id,
     const sessions::PlatformSpecificTabData* tab_platform_data,
@@ skipping 31 matching lines @@
     for (auto it = TabModelList::begin(); it != TabModelList::end(); ++it) {
       TabModel* model = *it;
       if (!model->IsOffTheRecord()) {
         return model->GetLiveTabContext();
       }
     }
   }
 
   return tab_model ? tab_model->GetLiveTabContext() : nullptr;
 }