Adding notifications for new sync types.

chrome/browser/ui/webui/ntp/ntp_resource_cache.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_NTP_RESOURCE_CACHE_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
+#include "base/string16.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "content/common/notification_observer.h"
 #include "content/common/notification_registrar.h"
 
 class Profile;
 class RefCountedMemory;
 
 // This class keeps a cache of NTP resources (HTML and CSS) so we don't have to
 // regenerate them all the time.
 class NTPResourceCache : public NotificationObserver,
                          public ProfileKeyedService {
  public:
   explicit NTPResourceCache(Profile* profile);
   virtual ~NTPResourceCache();
 
   RefCountedMemory* GetNewTabHTML(bool is_incognito);
   RefCountedMemory* GetNewTabCSS(bool is_incognito);
 
   // NotificationObserver interface.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  private:
   Profile* profile_;
 
+  // Returns a message describing any newly-added sync types, or an empty
+  // string if all types have already been acknowledged.
+  string16 GetSyncTypeMessage();
+
   void CreateNewTabIncognitoHTML();
   scoped_refptr<RefCountedMemory> new_tab_incognito_html_;
   void CreateNewTabHTML();
   scoped_refptr<RefCountedMemory> new_tab_html_;
 
   void CreateNewTabIncognitoCSS();
   scoped_refptr<RefCountedMemory> new_tab_incognito_css_;
   void CreateNewTabCSS();
   scoped_refptr<RefCountedMemory> new_tab_css_;
 
   NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPResourceCache);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_