RemoveZoomWidgetObservers  111 ash/magnifier/partial_magnification_controller.cc   RemoveZoomWidgetObservers();
RemoveZoomWidgetObservers  174 ash/magnifier/partial_magnification_controller.cc     RemoveZoomWidgetObservers();
RemoveZoomWidgetObservers   63 ash/magnifier/partial_magnification_controller.h   void RemoveZoomWidgetObservers();