Start splitting out WebUI into an implementation class and an interface that each page implements...

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

 // Copyright (c) 2011 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/browser/webui/web_ui.h"
+#include "content/public/browser/web_ui_controller.h"
 
 class Profile;
 class PrefService;
 
 // The Web UI handler for chrome://syncpromo.
-class SyncPromoUI : public WebUI {
+class SyncPromoUI : public WebUI, public content::WebUIController {
  public:
   // Constructs a SyncPromoUI. |contents| is the WebContents that this WebUI is
   // associated with. |contents| may not be NULL.
   explicit SyncPromoUI(content::WebContents* contents);
 
   // 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.
@@ skipping 29 matching lines @@
   static GURL GetNextPageURLForSyncPromoURL(const GURL& url);
 
   // Returns true if the sync promo page was ever shown at startup.
   static bool UserHasSeenSyncPromoAtStartup(Profile* profile);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncPromoUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SYNC_PROMO_SYNC_PROMO_UI_H_