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

Source/core/animation/ElementAnimation.h

Index: Source/core/animation/ElementAnimation.h
diff --git a/Source/core/animation/ElementAnimation.h b/Source/core/animation/ElementAnimation.h
index eb3a90482b5e37f708758a9d47bc4ac99c1bd677..99882f28ed15f55f07b080b9b9c94e75b0ea8b9c 100644
--- a/Source/core/animation/ElementAnimation.h
+++ b/Source/core/animation/ElementAnimation.h
@@ -50,7 +50,7 @@ class ElementAnimation {
 public:
     static AnimationPlayer* animate(Element& element, const AnimationEffectOrDictionarySequence& effectInput, double duration, ExceptionState& exceptionState)
     {
-        RefPtrWillBeRawPtr<AnimationEffect> effect = EffectInput::convert(&element, effectInput, exceptionState);
+        AnimationEffect* effect = EffectInput::convert(&element, effectInput, exceptionState);
         if (exceptionState.hadException())
             return 0;
         return animateInternal(element, effect, TimingInput::convert(duration));
@@ -58,7 +58,7 @@ public:
 
     static AnimationPlayer* animate(Element& element, const AnimationEffectOrDictionarySequence& effectInput, const AnimationTimingProperties& timingInput, ExceptionState& exceptionState)
     {
-        RefPtrWillBeRawPtr<AnimationEffect> effect = EffectInput::convert(&element, effectInput, exceptionState);
+        AnimationEffect* effect = EffectInput::convert(&element, effectInput, exceptionState);
         if (exceptionState.hadException())
             return 0;
         return animateInternal(element, effect, TimingInput::convert(timingInput));
@@ -66,7 +66,7 @@ public:
 
     static AnimationPlayer* animate(Element& element, const AnimationEffectOrDictionarySequence& effectInput, ExceptionState& exceptionState)
     {
-        RefPtrWillBeRawPtr<AnimationEffect> effect = EffectInput::convert(&element, effectInput, exceptionState);
+        AnimationEffect* effect = EffectInput::convert(&element, effectInput, exceptionState);
         if (exceptionState.hadException())
             return 0;
         return animateInternal(element, effect, Timing());
@@ -88,10 +88,10 @@ public:
     }
 
 private:
-    static AnimationPlayer* animateInternal(Element& element, PassRefPtrWillBeRawPtr<AnimationEffect> effect, const Timing& timing)
+    static AnimationPlayer* animateInternal(Element& element, AnimationEffect* effect, const Timing& timing)
     {
-        RefPtrWillBeRawPtr<Animation> animation = Animation::create(&element, effect, timing);
-        return element.document().timeline().play(animation.get());
+        Animation* animation = Animation::create(&element, effect, timing);
+        return element.document().timeline().play(animation);
     }
 };