Abstract WebContents/NavigationController from core TabRestore code

chrome/browser/ui/tab_helpers.cc

Index: chrome/browser/ui/tab_helpers.cc
diff --git a/chrome/browser/ui/tab_helpers.cc b/chrome/browser/ui/tab_helpers.cc
index 5f477c0dc193476a09ec612b226bb6f4a0527569..4a12ff575ba775f98fbe3bc64819218105a217fc 100644
--- a/chrome/browser/ui/tab_helpers.cc
+++ b/chrome/browser/ui/tab_helpers.cc
@@ -45,6 +45,7 @@
 #include "components/history/content/browser/web_contents_top_sites_observer.h"
 #include "components/history/core/browser/top_sites.h"
 #include "components/password_manager/core/browser/password_manager.h"
+#include "components/sessions/content/content_open_tab.h"
 #include "components/tracing/tracing_switches.h"
 #include "content/public/browser/web_contents.h"
 
@@ -163,6 +164,7 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
   ManagePasswordsUIController::CreateForWebContents(web_contents);
   NavigationCorrectionTabObserver::CreateForWebContents(web_contents);
   NavigationMetricsRecorder::CreateForWebContents(web_contents);
+  sessions::ContentOpenTab::CreateForWebContents(web_contents);
   PopupBlockerTabHelper::CreateForWebContents(web_contents);
   PrefsTabHelper::CreateForWebContents(web_contents);
   prerender::PrerenderTabHelper::CreateForWebContents(web_contents);