Add a blocking version of the sync promo dialog

chrome/browser/ui/webui/sync_promo/sync_promo_handler2.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_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_HANDLER2_H_
 #pragma once
 
 #include "chrome/browser/ui/webui/sync_setup_handler2.h"
 
@@ skipping 28 matching lines @@
 
  protected:
   virtual void StepWizardForShowSetupUI() OVERRIDE;
 
   virtual void ShowSetupUI() OVERRIDE;
 
  private:
   // JavaScript callback handler to close the sync promo.
   void HandleCloseSyncPromo(const base::ListValue* args);
 
+  // Gets the sync promo layout for the current sync promo version.
+  int GetPromoVersion();
+
   // JavaScript callback handler to initialize the sync promo.
   void HandleInitializeSyncPromo(const base::ListValue* args);
 
   // JavaScript handler to record the duration for which the throbber was
   // visible during an attempted sign-in flow.
   void HandleRecordThrobberTime(const base::ListValue* args);
 
   // JavaScript handler to record the number of times a user attempted to sign
   // in to chrome while they were on the sync promo page.
   void HandleRecordSignInAttempts(const base::ListValue* args);
@@ skipping 38 matching lines @@
   // Extra UMA histogram name to log stats to, based on the source for showing
   // the sync promo page.
   std::string histogram_name_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPromoHandler2);
 };
 
 }  // namespace options2
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_HANDLER2_H_