Use PrefChangeRegistrar everywhere

chrome/browser/host_zoom_map.h

 // Copyright (c) 2010 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.
 
 // Maps hostnames to custom zoom levels.  Written on the UI thread and read on
 // any thread.  One instance per profile.
 
 #ifndef CHROME_BROWSER_HOST_ZOOM_MAP_H_
 #define CHROME_BROWSER_HOST_ZOOM_MAP_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/lock.h"
 #include "base/ref_counted.h"
+#include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
 
 class GURL;
 class PrefService;
 class Profile;
 
 class HostZoomMap : public NotificationObserver,
                     public base::RefCountedThreadSafe<HostZoomMap> {
  public:
@@ skipping 48 matching lines @@
   HostZoomLevels host_zoom_levels_;
 
   // Used around accesses to |host_zoom_levels_| to guarantee thread safety.
   mutable Lock lock_;
 
   // Whether we are currently updating preferences, this is used to ignore
   // notifications from the preference service that we triggered ourself.
   bool updating_preferences_;
 
   NotificationRegistrar registrar_;
+  PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HostZoomMap);
 };
 
 #endif  // CHROME_BROWSER_HOST_ZOOM_MAP_H_