Modify RecentTabHelper to be always-on and observe the loading of the pages.

chrome/browser/ui/tab_helpers.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/browser/ui/tab_helpers.h"
 
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/chrome_content_settings_client.h"
@@ skipping 47 matching lines @@
 #include "chrome/browser/android/banners/app_banner_manager_android.h"
 #include "chrome/browser/android/data_usage/data_use_tab_helper.h"
 #include "chrome/browser/android/offline_pages/offline_page_tab_helper.h"
 #include "chrome/browser/android/offline_pages/recent_tab_helper.h"
 #include "chrome/browser/android/voice_search_tab_helper.h"
 #include "chrome/browser/android/webapps/single_tab_mode_tab_helper.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/ntp_snippets/bookmark_last_visit_updater.h"
 #include "chrome/browser/ui/android/context_menu_helper.h"
 #include "chrome/browser/ui/android/view_android_helper.h"
-#include "components/offline_pages/offline_page_feature.h"
 #else
 #include "chrome/browser/banners/app_banner_manager_desktop.h"
 #include "chrome/browser/permissions/permission_request_manager.h"
 #include "chrome/browser/plugins/plugin_observer.h"
 #include "chrome/browser/safe_browsing/safe_browsing_tab_observer.h"
 #include "chrome/browser/thumbnails/thumbnail_tab_helper.h"
 #include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
 #include "chrome/browser/ui/hung_plugin_tab_helper.h"
 #include "chrome/browser/ui/sad_tab_helper.h"
 #include "chrome/browser/ui/search_engines/search_engine_tab_helper.h"
@@ skipping 111 matching lines @@
 
 #if BUILDFLAG(ANDROID_JAVA_UI)
   banners::AppBannerManagerAndroid::CreateForWebContents(web_contents);
   BookmarkLastVisitUpdater::CreateForWebContentsWithBookmarkModel(
       web_contents, BookmarkModelFactory::GetForBrowserContext(
                         web_contents->GetBrowserContext()));
   ContextMenuHelper::CreateForWebContents(web_contents);
   DataUseTabHelper::CreateForWebContents(web_contents);
 
   offline_pages::OfflinePageTabHelper::CreateForWebContents(web_contents);
-  if (offline_pages::IsOffliningRecentPagesEnabled())
-    offline_pages::RecentTabHelper::CreateForWebContents(web_contents);
+  offline_pages::RecentTabHelper::CreateForWebContents(web_contents);
 
   SingleTabModeTabHelper::CreateForWebContents(web_contents);
   ViewAndroidHelper::CreateForWebContents(web_contents);
   VoiceSearchTabHelper::CreateForWebContents(web_contents);
 #else
   BookmarkTabHelper::CreateForWebContents(web_contents);
   extensions::ChromeExtensionWebContentsObserver::CreateForWebContents(
       web_contents);
   extensions::WebNavigationTabObserver::CreateForWebContents(web_contents);
   HungPluginTabHelper::CreateForWebContents(web_contents);
@@ skipping 51 matching lines @@
 
   if (predictors::ResourcePrefetchPredictorFactory::GetForProfile(
       web_contents->GetBrowserContext())) {
     predictors::ResourcePrefetchPredictorTabHelper::CreateForWebContents(
         web_contents);
   }
 
   if (tracing::NavigationTracingObserver::IsEnabled())
     tracing::NavigationTracingObserver::CreateForWebContents(web_contents);
 }