GetActiveOutputDeviceIconId 27 ash/system/audio/tray_audio_delegate.h virtual int GetActiveOutputDeviceIconId() = 0; GetActiveOutputDeviceIconId 212 ash/system/audio/volume_view.cc int device_icon = audio_delegate_->GetActiveOutputDeviceIconId(); GetActiveOutputDeviceIconId 23 ash/system/chromeos/audio/tray_audio_delegate_chromeos.h virtual int GetActiveOutputDeviceIconId() OVERRIDE; GetActiveOutputDeviceIconId 27 ash/system/win/audio/tray_audio_delegate_win.h virtual int GetActiveOutputDeviceIconId() OVERRIDE;