Refactor LoginUIService to not rely on WebUI.

chrome/browser/ui/webui/sync_promo/sync_promo_handler.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_HANDLER_H_
 #pragma once
 
 #include "chrome/browser/ui/webui/sync_setup_handler.h"
 
@@ skipping 16 matching lines @@
   // settings. |show_advanced| is ignored because we never want to display the
   // "Sync Everything" dialog for the sync promo.
   virtual void DisplayConfigureSync(bool show_advanced,
                                     bool passphrase_failed) OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // LoginUIService::LoginUI implementation.
+  virtual void CloseUI() OVERRIDE;
+
  protected:
   virtual void ShowSetupUI() OVERRIDE;
 
   virtual void RecordSignin() OVERRIDE;
 
  private:
   // JavaScript callback handler to close the sync promo.
   void HandleCloseSyncPromo(const base::ListValue* args);
 
   // JavaScript callback handler to initialize the sync promo.
@@ skipping 38 matching lines @@
 
   // If the user closes the whole window we'll get a close notification from the
   // tab as well, so this bool acts as a small mutex to only report the close
   // method once.
   bool window_already_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPromoHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_HANDLER_H_