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

Source/core/animation/Animation.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 40 matching lines @@
 namespace {
 
 static unsigned nextSequenceNumber()
 {
     static unsigned next = 0;
     return ++next;
 }
 
 }
 
-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) {
         timeline->animationAttached(*animation);
         animation->attachCompositorTimeline();
     }
 
-    return animation.release();
+    return animation;
 }
 
 Animation::Animation(ExecutionContext* executionContext, AnimationTimeline& timeline, AnimationEffect* content)
     : ActiveDOMObject(executionContext)
     , m_playState(Idle)
     , m_playbackRate(1)
     , m_startTime(nullValue())
     , m_holdTime(0)
     , m_sequenceNumber(nextSequenceNumber())
     , m_content(content)
@@ skipping 13 matching lines @@
         if (m_content->animation()) {
             m_content->animation()->cancel();
             m_content->animation()->setSource(0);
         }
         m_content->attach(this);
     }
 }
 
 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)
 void Animation::detachFromTimeline()
 {
     dispose();
     m_timeline = nullptr;
 }
 #endif
 
@@ skipping 895 matching lines @@
     visitor->trace(m_content);
     visitor->trace(m_timeline);
     visitor->trace(m_pendingFinishedEvent);
     visitor->trace(m_finishedPromise);
     visitor->trace(m_readyPromise);
     EventTargetWithInlineData::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace