[Sketch] Animations: Torpedo the old intrusive animation system.

Source/core/animation/AnimationPlayer.cpp

Index: Source/core/animation/AnimationPlayer.cpp
diff --git a/Source/core/animation/AnimationPlayer.cpp b/Source/core/animation/AnimationPlayer.cpp
index 99a947be0be39fd2838bd2cb755a7331076d2671..a6ffd822f96b8218a69c023e434105628e05bf75 100644
--- a/Source/core/animation/AnimationPlayer.cpp
+++ b/Source/core/animation/AnimationPlayer.cpp
@@ -854,7 +854,7 @@ void AnimationPlayer::endUpdatingState()
 
 void AnimationPlayer::createCompositorPlayer()
 {
-    if (RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() && !m_compositorPlayer && Platform::current()->compositorSupport()) {
+    if (!m_compositorPlayer) {
         m_compositorPlayer = adoptPtr(Platform::current()->compositorSupport()->createAnimationPlayer());
         ASSERT(m_compositorPlayer);
         m_compositorPlayer->setAnimationDelegate(this);
@@ -895,7 +895,7 @@ void AnimationPlayer::detachCompositorTimeline()
 
 void AnimationPlayer::attachCompositedLayers()
 {
-    if (!RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled() || !m_compositorPlayer)
+    if (!m_compositorPlayer)
         return;
 
     ASSERT(m_content);
@@ -913,7 +913,6 @@ void AnimationPlayer::detachCompositedLayers()
 
 void AnimationPlayer::notifyAnimationStarted(double monotonicTime, int group)
 {
-    ASSERT(RuntimeEnabledFeatures::compositorAnimationTimelinesEnabled());
     timeline()->document()->compositorPendingAnimations().notifyCompositorAnimationStarted(monotonicTime, group);
 }