Add a blocking version of the sync promo dialog

chrome/browser/ui/webui/sync_promo/sync_promo_ui.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_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_
 #pragma once
 
 #include "content/public/browser/web_ui_controller.h"
 
 class Profile;
 class PrefService;
 
 // The Web UI handler for chrome://syncpromo.
 class SyncPromoUI : public content::WebUIController {
  public:
+  enum Version {
+    VERSION_DEFAULT = 0,
+    VERSION_DEVICES,
+    VERSION_VERBOSE,
+    VERSION_SIMPLE,
+    VERSION_DIALOG,
+    VERSION_COUNT,
+  };
+
   // Constructs a SyncPromoUI.
   explicit SyncPromoUI(content::WebUI* web_ui);
 
   // Returns true if the sync promo should be visible.
   // |profile| is the profile of the tab the promo would be shown on.
   static bool ShouldShowSyncPromo(Profile* profile);
 
   // Returns true if we should show the sync promo at startup.
   static bool ShouldShowSyncPromoAtStartup(Profile* profile,
                                            bool is_new_profile);
@@ skipping 33 matching lines @@
 
   // Gets the source from the query portion of the sync promo URL.
   static std::string GetSourceForSyncPromoURL(const GURL& url);
 
   // Returns true if the sync promo page was ever shown at startup.
   static bool UserHasSeenSyncPromoAtStartup(Profile* profile);
 
   // Returns the version of the sync promo UI that we should display.
   // Each version changes the UI slightly (for example, replacing text with
   // an infographic).
-  static int GetSyncPromoVersion();
+  static Version GetSyncPromoVersion();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncPromoUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_