[Oilpan] Migrate most classes under core/animations to Oilpan heap.

Source/core/animation/SampledEffect.cpp

Index: Source/core/animation/SampledEffect.cpp
diff --git a/Source/core/animation/SampledEffect.cpp b/Source/core/animation/SampledEffect.cpp
index 798f039eef5f61035e2202773437f3f2e1f3b103..4df0b726728e6fc0284ec2159fb6b717f67b1075 100644
--- a/Source/core/animation/SampledEffect.cpp
+++ b/Source/core/animation/SampledEffect.cpp
@@ -11,7 +11,7 @@
 
 namespace blink {
 
-SampledEffect::SampledEffect(Animation* animation, PassOwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>> interpolations)
+SampledEffect::SampledEffect(Animation* animation, HeapVector<Member<Interpolation>>* interpolations)
     : m_animation(animation)
     , m_player(animation->player())
     , m_interpolations(interpolations)
@@ -32,9 +32,7 @@ DEFINE_TRACE(SampledEffect)
 {
     visitor->trace(m_animation);
     visitor->trace(m_player);
-#if ENABLE(OILPAN)
     visitor->trace(m_interpolations);
-#endif
 }
 
 void SampledEffect::applySVGUpdate(SVGElement& targetElement)