NotifyObserversOpacityAnimated  353 cc/animation/layer_animation_controller.cc       NotifyObserversOpacityAnimated(event.opacity);
NotifyObserversOpacityAnimated  772 cc/animation/layer_animation_controller.cc           NotifyObserversOpacityAnimated(opacity);
NotifyObserversOpacityAnimated  162 cc/animation/layer_animation_controller.h   void NotifyObserversOpacityAnimated(float opacity);