[cros] Go back to EASE_OUT for boot transition

ui/base/animation/tween.cc

Index: ui/base/animation/tween.cc
diff --git a/ui/base/animation/tween.cc b/ui/base/animation/tween.cc
index f3a854f05cf8748e8bdf5f292b019c1cfca82a6b..18a21b8f1696a2d98145aa8a7a0728e910661e05 100644
--- a/ui/base/animation/tween.cc
+++ b/ui/base/animation/tween.cc
@@ -46,6 +46,9 @@ double Tween::CalculateValue(Tween::Type type, double state) {
       return 1.0 - pow(1.0 - state, 2);
 
     case EASE_OUT_2:
+      return 1.0 - pow(1.0 - state, 3);
+
+    case EASE_OUT_3:
       return 1.0 - pow(1.0 - state, 4);
 
     case SMOOTH_IN_OUT: