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

Source/core/animation/css/CSSAnimations.h

Index: Source/core/animation/css/CSSAnimations.h
diff --git a/Source/core/animation/css/CSSAnimations.h b/Source/core/animation/css/CSSAnimations.h
index 04825d64188d9c54963d2c15cb342279bc3ba21c..9a719fe6e2e9979b4654b2cec83638aa37cfba45 100644
--- a/Source/core/animation/css/CSSAnimations.h
+++ b/Source/core/animation/css/CSSAnimations.h
@@ -60,9 +60,9 @@ public:
 
     static const StylePropertyShorthand& propertiesForTransitionAll();
     static bool isAllowedAnimation(CSSPropertyID);
-    static PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> calculateUpdate(const Element* animatingElement, Element&, const ComputedStyle&, ComputedStyle* parentStyle, StyleResolver*);
+    static CSSAnimationUpdate* calculateUpdate(const Element* animatingElement, Element&, const ComputedStyle&, ComputedStyle* parentStyle, StyleResolver*);
 
-    void setPendingUpdate(PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> update) { m_pendingUpdate = update; }
+    void setPendingUpdate(CSSAnimationUpdate* update) { m_pendingUpdate = update; }
     void maybeApplyPendingUpdate(Element*);
     bool isEmpty() const { return m_animations.isEmpty() && m_transitions.isEmpty() && !m_pendingUpdate; }
     void cancel();
@@ -70,7 +70,7 @@ public:
     DECLARE_TRACE();
 
 private:
-    class RunningAnimation final : public RefCountedWillBeGarbageCollectedFinalized<RunningAnimation> {
+    class RunningAnimation final : public GarbageCollectedFinalized<RunningAnimation> {
     public:
         RunningAnimation(PassRefPtrWillBeRawPtr<AnimationPlayer> player, CSSAnimationUpdate::NewAnimation animation)
             : player(player)
@@ -110,17 +110,17 @@ private:
         }
 
         RefPtrWillBeMember<AnimationPlayer> player;
-        RawPtrWillBeMember<const AnimatableValue> from;
-        RawPtrWillBeMember<const AnimatableValue> to;
+        Member<const AnimatableValue> from;
+        Member<const AnimatableValue> to;
     };
 
-    using AnimationMap = WillBeHeapHashMap<AtomicString, RefPtrWillBeMember<RunningAnimation>>;
+    using AnimationMap = HeapHashMap<AtomicString, Member<RunningAnimation>>;
     AnimationMap m_animations;
 
-    using TransitionMap = WillBeHeapHashMap<CSSPropertyID, RunningTransition>;
+    using TransitionMap = HeapHashMap<CSSPropertyID, RunningTransition>;
     TransitionMap m_transitions;
 
-    OwnPtrWillBeMember<CSSAnimationUpdate> m_pendingUpdate;
+    Member<CSSAnimationUpdate> m_pendingUpdate;
 
     ActiveInterpolationMap m_previousActiveInterpolationsForAnimations;