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

chrome/browser/ui/webui/ntp/new_tab_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_NTP_NEW_TAB_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
 #include "content/browser/webui/web_ui.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_ui_controller.h"
 
 class GURL;
 class PrefService;
 class Profile;
 
 // The TabContents used for the New Tab page.
-class NewTabUI : public WebUI,
+class NewTabUI : public WebUI, public content::WebUIController,
                  public content::NotificationObserver {
  public:
   explicit NewTabUI(content::WebContents* manager);
   virtual ~NewTabUI();
 
   static void RegisterUserPrefs(PrefService* prefs);
 
   // Adds "url", "title", and "direction" keys on incoming dictionary, setting
   // title as the url as a fallback on empty title.
   static void SetURLTitleAndDirection(base::DictionaryValue* dictionary,
                                       const string16& title,
                                       const GURL& gurl);
 
   // Returns a pointer to a NewTabUI if the WebUI object is a new tab page.
   static NewTabUI* FromWebUI(WebUI* ui);
 
   // The current preference version.
   static int current_pref_version() { return current_pref_version_; }
 
-  // Override WebUI methods so we can hook up the paint timer to the render
-  // view host.
+  // WebUIController implementation:
   virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewReused(RenderViewHost* render_view_host) OVERRIDE;
 
   // Returns true if the bookmark bar can be displayed over this webui, detached
   // from the location bar.
   bool CanShowBookmarkBar() const;
 
   class NewTabHTMLSource : public ChromeURLDataManager::DataSource {
    public:
     explicit NewTabHTMLSource(Profile* profile);
@@ skipping 40 matching lines @@
   base::TimeTicks last_paint_;
   // Scoping so we can be sure our timeouts don't outlive us.
   base::OneShotTimer<NewTabUI> timer_;
   // The preference version. This used for migrating prefs of the NTP.
   static const int current_pref_version_ = 3;
 
   DISALLOW_COPY_AND_ASSIGN(NewTabUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_