RemoveSyncedPrefObserver  557 chrome/browser/prefs/pref_model_associator.cc void PrefModelAssociator::RemoveSyncedPrefObserver(const std::string& name,
RemoveSyncedPrefObserver  158 chrome/browser/prefs/pref_service_syncable.cc void PrefServiceSyncable::RemoveSyncedPrefObserver(