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

Source/core/animation/SampledEffect.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/animation/SampledEffect.h"
 
 #include "core/animation/SVGInterpolation.h"
 #include "core/animation/StyleInterpolation.h"
 #include "core/svg/SVGElement.h"
 
 namespace blink {
 
-SampledEffect::SampledEffect(KeyframeEffect* effect, PassOwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>> interpolations)
+SampledEffect::SampledEffect(KeyframeEffect* effect, HeapVector<Member<Interpolation>>* interpolations)
     : m_effect(effect)
     , m_animation(effect->animation())
     , m_interpolations(interpolations)
     , m_sequenceNumber(effect->animation()->sequenceNumber())
     , m_priority(effect->priority())
 {
     ASSERT(m_interpolations && !m_interpolations->isEmpty());
 }
 
 void SampledEffect::clear()
 {
     m_effect = nullptr;
     m_animation = nullptr;
     m_interpolations->clear();
 }
 
 DEFINE_TRACE(SampledEffect)
 {
     visitor->trace(m_effect);
     visitor->trace(m_animation);
-#if ENABLE(OILPAN)
     visitor->trace(m_interpolations);
-#endif
 }
 
 void SampledEffect::applySVGUpdate(SVGElement& targetElement)
 {
     for (const auto& interpolation : *m_interpolations) {
         if (interpolation->isSVGInterpolation()) {
             toSVGInterpolation(interpolation.get())->apply(targetElement);
         }
     }
 }
 
 } // namespace blink