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

Source/core/animation/Animation.cpp

Index: Source/core/animation/Animation.cpp
diff --git a/Source/core/animation/Animation.cpp b/Source/core/animation/Animation.cpp
index aa1ddae606f38a8801d42447d6c71c56ce99bfa3..fe2306a6d13b737d5cf01748eb424c8ccf74016d 100644
--- a/Source/core/animation/Animation.cpp
+++ b/Source/core/animation/Animation.cpp
@@ -58,14 +58,14 @@ static unsigned nextSequenceNumber()
 
 }
 
-PassRefPtrWillBeRawPtr<Animation> Animation::create(AnimationEffect* source, AnimationTimeline* timeline)
+Animation* Animation::create(AnimationEffect* source, AnimationTimeline* timeline)
 {
     if (!timeline) {
         // FIXME: Support creating animations without a timeline.
         return nullptr;
     }
 
-    RefPtrWillBeRawPtr<Animation> animation = adoptRefWillBeNoop(new Animation(timeline->document()->contextDocument().get(), *timeline, source));
+    Animation* animation = new Animation(timeline->document()->contextDocument().get(), *timeline, source);
     animation->suspendIfNeeded();
 
     if (timeline) {
@@ -73,7 +73,7 @@ PassRefPtrWillBeRawPtr<Animation> Animation::create(AnimationEffect* source, Ani
         animation->attachCompositorTimeline();
     }
 
-    return animation.release();
+    return animation;
 }
 
 Animation::Animation(ExecutionContext* executionContext, AnimationTimeline& timeline, AnimationEffect* content)
@@ -107,14 +107,17 @@ Animation::Animation(ExecutionContext* executionContext, AnimationTimeline& time
 
 Animation::~Animation()
 {
+    destroyCompositorPlayer();
+}
+
+void Animation::disposeAnimation()
+{
 #if !ENABLE(OILPAN)
     if (m_content)
         m_content->detach();
     if (m_timeline)
         m_timeline->animationDestroyed(this);
 #endif
-
-    destroyCompositorPlayer();
 }
 
 #if !ENABLE(OILPAN)