AddLayerAnimationEventObserver  413 cc/layers/layer.h   void AddLayerAnimationEventObserver(
AddLayerAnimationEventObserver  481 ui/compositor/layer.cc   cc_layer_->AddLayerAnimationEventObserver(this);
AddLayerAnimationEventObserver  927 ui/compositor/layer.cc   cc_layer_->AddLayerAnimationEventObserver(this);