| Index: chrome/browser/ui/prefs/prefs_tab_helper.h | 
| diff --git a/chrome/browser/ui/prefs/prefs_tab_helper.h b/chrome/browser/ui/prefs/prefs_tab_helper.h | 
| index cfb808b2c3d77096beb5d062367dcab1249004e1..5dc8c981bcacee8ff44a5bb86b2917161ee790e9 100644 | 
| --- a/chrome/browser/ui/prefs/prefs_tab_helper.h | 
| +++ b/chrome/browser/ui/prefs/prefs_tab_helper.h | 
| @@ -7,6 +7,7 @@ | 
|  | 
| #include "base/compiler_specific.h" | 
| #include "base/prefs/public/pref_change_registrar.h" | 
| +#include "base/prefs/public/pref_observer.h" | 
| #include "content/public/browser/notification_observer.h" | 
| #include "content/public/browser/notification_registrar.h" | 
| #include "content/public/browser/web_contents_user_data.h" | 
| @@ -21,6 +22,7 @@ class WebContents; | 
|  | 
| // Per-tab class to handle user preferences. | 
| class PrefsTabHelper : public content::NotificationObserver, | 
| +                       public PrefObserver, | 
| public content::WebContentsUserData<PrefsTabHelper> { | 
| public: | 
| virtual ~PrefsTabHelper(); | 
| @@ -41,6 +43,10 @@ class PrefsTabHelper : public content::NotificationObserver, | 
| const content::NotificationSource& source, | 
| const content::NotificationDetails& details) OVERRIDE; | 
|  | 
| +  // PrefObserver overrides: | 
| +  virtual void OnPreferenceChanged(PrefServiceBase* service, | 
| +                                   const std::string& pref_name) OVERRIDE; | 
| + | 
| // Update the WebContents's RendererPreferences. | 
| void UpdateRendererPreferences(); | 
|  | 
|  |