SetVolumeControlDelegate  268 ash/system/tray/default_system_tray_delegate.cc void DefaultSystemTrayDelegate::SetVolumeControlDelegate(
SetVolumeControlDelegate  880 chrome/browser/ui/ash/system_tray_delegate_chromeos.cc void SystemTrayDelegateChromeOS::SetVolumeControlDelegate(
SetVolumeControlDelegate  266 chrome/browser/ui/ash/system_tray_delegate_win.cc   virtual void SetVolumeControlDelegate(