| Index: chrome/browser/ui/gtk/gtk_theme_service.h | 
| diff --git a/chrome/browser/ui/gtk/gtk_theme_service.h b/chrome/browser/ui/gtk/gtk_theme_service.h | 
| index 12dba20ab2759a254ad66b67c8faabcef9b97875..1d4f1479033dfc23e543e5906c5b0f5d2f34a3c2 100644 | 
| --- a/chrome/browser/ui/gtk/gtk_theme_service.h | 
| +++ b/chrome/browser/ui/gtk/gtk_theme_service.h | 
| @@ -12,8 +12,8 @@ | 
| #include "base/lazy_instance.h" | 
| #include "base/memory/scoped_ptr.h" | 
| #include "base/prefs/public/pref_change_registrar.h" | 
| +#include "base/prefs/public/pref_observer.h" | 
| #include "chrome/browser/themes/theme_service.h" | 
| -#include "content/public/browser/notification_observer.h" | 
| #include "ui/base/glib/glib_integers.h" | 
| #include "ui/base/gtk/gtk_signal.h" | 
| #include "ui/base/gtk/owned_widget_gtk.h" | 
| @@ -41,7 +41,7 @@ typedef struct _GtkStyle GtkStyle; | 
| typedef struct _GtkWidget GtkWidget; | 
|  | 
| // Specialization of ThemeService which supplies system colors. | 
| -class GtkThemeService : public ThemeService { | 
| +class GtkThemeService : public ThemeService, public PrefObserver { | 
| public: | 
| // A list of integer keys for a separate PerDisplaySurfaceMap that keeps | 
| // what would otherwise be static icons on the X11 server. | 
| @@ -77,10 +77,9 @@ class GtkThemeService : public ThemeService { | 
| virtual bool UsingDefaultTheme() const OVERRIDE; | 
| virtual bool UsingNativeTheme() const OVERRIDE; | 
|  | 
| -  // Overridden from ThemeService, content::NotificationObserver: | 
| -  virtual void Observe(int type, | 
| -                       const content::NotificationSource& source, | 
| -                       const content::NotificationDetails& details) OVERRIDE; | 
| +  // Overridden from PrefObserver: | 
| +  virtual void OnPreferenceChanged(PrefServiceBase* service, | 
| +                                   const std::string& pref_name) OVERRIDE; | 
|  | 
| // Creates a GtkChromeButton instance, registered with this theme provider, | 
| // with a "destroy" signal to remove it from our internal list when it goes | 
|  |