David Edmundson authored Oct 12, 2022 and Nate Graham committed Oct 12, 2022

AnimationEffect inherits from CrossfadeEffect as it may do a crossfade,
but it also has to perform non-crossfading activities with a custom
shader.

For crossfades we want to draw the old and new window, but this isn't
needed where the crossFadeProgress remains at 0.

BUG: 460277


(cherry picked from commit 36440a9d)