Abstract WebContents/NavigationController from core TabRestore code

chrome/browser/extensions/api/tabs/ash_panel_contents.cc

Index: chrome/browser/extensions/api/tabs/ash_panel_contents.cc
diff --git a/chrome/browser/extensions/api/tabs/ash_panel_contents.cc b/chrome/browser/extensions/api/tabs/ash_panel_contents.cc
index ac891e49e9d7eee87f9dbe7becac729d224fac7a..bf2f772ce9af2b14b3622c63e2913210ccc2a4af 100644
--- a/chrome/browser/extensions/api/tabs/ash_panel_contents.cc
+++ b/chrome/browser/extensions/api/tabs/ash_panel_contents.cc
@@ -13,6 +13,7 @@
 #include "chrome/browser/extensions/window_controller_list.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
+#include "components/sessions/content/content_open_tab.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
@@ -47,6 +48,8 @@ void AshPanelContents::Initialize(content::BrowserContext* context,
   SessionTabHelper::FromWebContents(web_contents_.get())->SetWindowID(
       host_->session_id());
 
+  sessions::ContentOpenTab::CreateForWebContents(web_contents_.get());
+
   // Responsible for loading favicons for the Launcher, which uses different
   // logic than the FaviconDriver associated with web_contents_ (instantiated in
   // AppWindow::Init())