Initial implementation of WorkletAnimation

third_party/WebKit/Source/core/animation/CompositorAnimations.cpp

Index: third_party/WebKit/Source/core/animation/CompositorAnimations.cpp
diff --git a/third_party/WebKit/Source/core/animation/CompositorAnimations.cpp b/third_party/WebKit/Source/core/animation/CompositorAnimations.cpp
index 0ea349bd8cd5098f91caadc1ee70821a5d6a91d1..391409315bb04c46d85140a4d7adfffb6c4c4a50 100644
--- a/third_party/WebKit/Source/core/animation/CompositorAnimations.cpp
+++ b/third_party/WebKit/Source/core/animation/CompositorAnimations.cpp
@@ -377,13 +377,15 @@ void CompositorAnimations::StartAnimationOnCompositor(
     double start_time,
     double time_offset,
     const Timing& timing,
-    const Animation& animation,
+    const Animation* animation,
+    CompositorAnimationPlayer* compositor_player,
     const EffectModel& effect,
     Vector<int>& started_animation_ids,
     double animation_playback_rate) {
+  DCHECK(compositor_player);
   DCHECK(started_animation_ids.IsEmpty());
-  DCHECK(IsCandidateForAnimationOnCompositor(timing, element, &animation,
-                                             effect, animation_playback_rate));
+  DCHECK(IsCandidateForAnimationOnCompositor(timing, element, animation, effect,
+                                             animation_playback_rate));
   DCHECK(CanStartAnimationOnCompositor(element));
 
   const KeyframeEffectModelBase& keyframe_effect =
@@ -396,8 +398,6 @@ void CompositorAnimations::StartAnimationOnCompositor(
   DCHECK(!animations.IsEmpty());
   for (auto& compositor_animation : animations) {
     int id = compositor_animation->Id();
-    CompositorAnimationPlayer* compositor_player = animation.CompositorPlayer();
-    DCHECK(compositor_player);
     compositor_player->AddAnimation(std::move(compositor_animation));
     started_animation_ids.push_back(id);
   }