Remove PrefObserver usages, batch 10.

chrome/browser/ui/webui/ntp/ntp_resource_cache.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_NTP_NTP_RESOURCE_CACHE_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/prefs/public/pref_change_registrar.h"
-#include "base/prefs/public/pref_observer.h"
 #include "base/string16.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace base {
 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 content::NotificationObserver,
-                         public PrefObserver,
                          public ProfileKeyedService {
  public:
   explicit NTPResourceCache(Profile* profile);
   virtual ~NTPResourceCache();
 
   base::RefCountedMemory* GetNewTabHTML(bool is_incognito);
   base::RefCountedMemory* GetNewTabCSS(bool is_incognito);
 
   // content::NotificationObserver interface.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // PrefObserver interface.
-  virtual void OnPreferenceChanged(PrefServiceBase* service,
-                                   const std::string& pref_name) OVERRIDE;
-
  private:
-  Profile* profile_;
+  void OnPreferenceChanged();
 
   void CreateNewTabHTML();
-  scoped_refptr<base::RefCountedMemory> new_tab_html_;
 
   // Helper to determine if the resource cache should be invalidated.
   // This is called on every page load, and can be used to check values that
   // don't generate a notification when changed (e.g., system preferences).
   bool NewTabCacheNeedsRefresh();
 
+  Profile* profile_;
+
+  scoped_refptr<base::RefCountedMemory> new_tab_html_;
+
 #if !defined(OS_ANDROID)
   // 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<base::RefCountedMemory> new_tab_incognito_html_;
 
   void CreateNewTabIncognitoCSS();
+
+  void CreateNewTabCSS();
+
+  scoped_refptr<base::RefCountedMemory> new_tab_incognito_html_;
   scoped_refptr<base::RefCountedMemory> new_tab_incognito_css_;
-  void CreateNewTabCSS();
   scoped_refptr<base::RefCountedMemory> new_tab_css_;
-
   content::NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
 #endif
 
   bool is_swipe_tracking_from_scroll_events_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(NTPResourceCache);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_RESOURCE_CACHE_H_