Use PrefChangeRegistrar everywhere

chrome/browser/sync/glue/preference_change_processor.h

Index: chrome/browser/sync/glue/preference_change_processor.h
diff --git a/chrome/browser/sync/glue/preference_change_processor.h b/chrome/browser/sync/glue/preference_change_processor.h
index cb25511fd5531bae8a2532b5e92ba9f9843458c3..1ef88dab611a55c6557b7671a6840cce71a1fbb4 100644
--- a/chrome/browser/sync/glue/preference_change_processor.h
+++ b/chrome/browser/sync/glue/preference_change_processor.h
@@ -8,6 +8,7 @@
 
 #include <string>
 
+#include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/sync/engine/syncapi.h"
 #include "chrome/browser/sync/glue/change_processor.h"
@@ -60,6 +61,8 @@ class PreferenceChangeProcessor : public ChangeProcessor,
   // Whether we are currently processing a preference change notification.
   bool processing_pref_change_;
 
+  PrefChangeRegistrar registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(PreferenceChangeProcessor);
 };