Purge impl-only animations awaiting deletion in AnimationPlayer::UpdateState.

cc/animation/animation_player.cc

Index: cc/animation/animation_player.cc
diff --git a/cc/animation/animation_player.cc b/cc/animation/animation_player.cc
index dd57cade867919dd604bfa673e986f86baab6078..d77e1de677395b4d51ccd15fc0d4b23e9d3ec685 100644
--- a/cc/animation/animation_player.cc
+++ b/cc/animation/animation_player.cc
@@ -253,7 +253,7 @@ void AnimationPlayer::PushPropertiesTo(AnimationPlayer* player_impl) {
     return;
 
   MarkAbortedAnimationsForDeletion(player_impl);
-  PurgeAnimationsMarkedForDeletion();
+  PurgeAnimationsMarkedForDeletion(/* impl_only */ false);
   PushNewAnimationsToImplThread(player_impl);
 
   // Remove finished impl side animations only after pushing,
@@ -298,6 +298,7 @@ void AnimationPlayer::UpdateState(bool start_ready_animations,
 
   MarkFinishedAnimations(last_tick_time_);
   MarkAnimationsForDeletion(last_tick_time_, events);
+  PurgeAnimationsMarkedForDeletion(/* impl_only */ true);
 
   if (start_ready_animations) {
     if (needs_to_start_animations()) {
@@ -1097,10 +1098,12 @@ void AnimationPlayer::MarkAbortedAnimationsForDeletion(
     element_animations_->SetNeedsUpdateImplClientState();
 }
 
-void AnimationPlayer::PurgeAnimationsMarkedForDeletion() {
-  base::EraseIf(animations_, [](const std::unique_ptr<Animation>& animation) {
-    return animation->run_state() == Animation::WAITING_FOR_DELETION;
-  });
+void AnimationPlayer::PurgeAnimationsMarkedForDeletion(bool impl_only) {
+  base::EraseIf(
+      animations_, [impl_only](const std::unique_ptr<Animation>& animation) {
+        return animation->run_state() == Animation::WAITING_FOR_DELETION &&
+               (!impl_only || animation->is_impl_only());
+      });
 }
 
 void AnimationPlayer::PushNewAnimationsToImplThread(