private:
// PrefObserver:
- virtual void OnPreferenceChanged(PrefService* service,
- const std::string& pref_name) OVERRIDE;
+ void OnPreferenceChanged(PrefService* service,
+ const std::string& pref_name) override;
static void InvokeUnnamedCallback(const base::Closure& callback,
const std::string& pref_name);