ChangeCallback     42 chrome/browser/managed_mode/managed_user_shared_settings_service.h                               const std::string& /* key */)> ChangeCallback;
ChangeCallback     24 chrome/browser/prefs/synced_pref_change_registrar.h   typedef base::Callback<void(bool)> ChangeCallback;
ChangeCallback     40 content/browser/media/capture/web_contents_tracker.h       ChangeCallback;
ChangeCallback    533 net/proxy/proxy_service.cc                               const ProxyConfig&)> ChangeCallback;